It's a problem from Opera's side. Opera's Ad blocker is totally broken.
I use Opera Mini too. In there, Opera Mini can not able to block any single ad though I've turned ON Ad blocker (In Automatic/High mode) And now this ad blocking problem seems on Opera browser too. This problem is everywhere.. & Opera's developers are sleeping as usual. Bugs & Problems are not a concern for them.
I wonder, all of a sudden the developers will wake up from sleep then will announce some Design changing, User Interface, Icon, Color changing s**t in the next version release of their browser instead of problem & bug fixing and optimization.

Opera Mini has so many problems. Day by day it's getting worse.
Now it's bloated with totally dumb unnecessary feature like 'File Sharing'.
Can't able to block any single ad via Automatic & High saving mode and yet they claim it's an ad blocking browser.
Has frequent page loading problem.

I also face this kind of ad showing problem.
Ads are annoying !!!!
I turned off "Lock Screen News" also turned off "Start Page Content" and turned off "News Notification"
But still I'm getting those annoying news ads.

Opera Mini disappoints us. Thumbs Down. Booooo !!!!!

Day by day, Opera Mini becomes a piece of sh*t. Since the developers ignores users expectation Opera Mini is falling down & down.
An ad blocker browser becomes a great host to show those crappy dumb annoying ads !!!! Seriously??? Who wants to see those dumb news ads? The answer is Nobody.
Now on the latest Opera Mini for Android; news are like floating here & there.
Previously there has;
Address bar ads & now Home page news ads, Notification ads, Lock Screen ads..
And maybe developers are thinking to add Pop up ads, in built banner ads etc etc bla..bla..bla
Ads are everywhere in this browser.
This is not good, definitely not good

Facing problem on Facebook using Opera Mini.

In "High Mode" on Facebook. If I press top right side button then that 'Facebook Setting' page doesn't come up. Moreover, I can't go to my Timeline, Can't go to Facebook Account settings.
After pressing that button Opera Mini just stuck & can't load that following page.
in Extreme mode its OK.
But while in Extreme mode, I can't able to share any YouTube videos from YouTube to Facebook. From YouTube website If I share any Video to Facebook It ends with an Error Message.

Day by day, Opera Mini becomes a piece of shit..
Fix those problems ASAP.

N.B- I'm on Samsung Galaxy J7 (Android 5.1.1) Using both latest Opera Mini 30 & beta 31 on 3G (HSPA+) network connection.

In PC version of Opera there has an option to render webpages as per user's selected font. Like customize Serif & Sens-Serif font to render the webpages with those selected fonts.
But here in on android version there has no feature like this. And I don't like default font (Noto Sans) which was set & pre-defined by Google. Webpages seems ugly when it's rendered based on this font.
There's a browser named UC Mini that can use any font to render the webpages. If I place any font in the browser created storage (place a font in the browser created font folder) then all the webpages can use & utilize the font, and render webpages by that following font.
So, I request to the Developer team that consider to add a feature where we can use our own choosen font & webpages can render based on the customized font as like the PC version of Opera.
Thanks.

From Facebook I tried to stream only 7MB sized video file. But after click play button then it starts loading & loading & loading.. After 2 minutes of loading then at the loading stage I press back button. And then Opera Mini stuck, it hangs my device & crashed. Please, fix slow loading time for streaming video. Moreover, Opera Mini can't stream/play (mpg) formats video. Add this formats to the built in video player.
Moreover, Only very few streaming videos are optimized via "Video Boost" feature.. Why??
Upgrade the 'Video Boost' feature.

@mbaluta
@olasia
@miyukiwork

Please take a view on Facebook problem.

Moreover, I can't enter to my Opera Account inside Opera Mini. Opera Sync feature From Opera Mini's settings "Sign into Opera" section. I give my username & password. Then it shows
"Temporary Server Error. Please try again Later"
Fix this problem too.

Opera is nothing else but loses their market share. Just because users get annoyed with Opera & behind the annoyance Opera developers disappoints users by creating more & more problems rather than they fix problems and any improvements.
I also get annoyed & try to find alternative to abandon poor Opera.
Alas!!! One of the greatest company now becomes bullshit.
Market share reference (from StatCounter):-
http://gs.statcounter.com/browser-market-share/mobile/worldwide/%23monthly-201709-201709-bar

Such a very useful feature named "Video Compression" is no longer available in Opera Mini. Maybe Opera sold its 'Rocket Optimizer' to another company.

Any update from Opera's end?
Still nothing.

@leocg
Yes, Owned by Chinese.
And these poor Chinese companies have a very good reputation to track & profiling users and store user data to serve them to Chinese Govt. Even sell user data with ad publishers and also bombered users with annoying ads everywhere.
Just like once upon a time a very good reputed company named Opera now becomes an ad showing company who tracks user data.

@miyukiwork
I've a compliant about taking screenshots.
Why Opera for Android prevents me to take screenshots in Private Browsing mode??
I mean, I frequently need to browse Private mode & I have to take screenshots as well too.
But there's no way.
Would you please take it a view & let the team know & consider this??
Thanks

If I try to open any video from any website through Extreme mode then Opera Mini always shows FULL SCREEN Interstitial ads.
It's so annoying that eventually let me use Modded Opera Mini by 3rd party individuals. (Modded Opera Mini doesn't shows any ad so far)
But actually I don't want to use modified Opera Mini as this could be malicious or steal user data. But Opera Mini's ads pisses me off.
Moreover, in Automatic & High mode Opera Mini can't block any single ad from any website. It was reported back then & the problem also confirmed by a Opera staff but the problem still remains. No fix at all.
Why da FK???????
I'll attach a snapshot. And I'd request you that, please remove this kind of Fking annoying ads from Opera Mini.
Thanks.

Screenshot:-

If I go to youtube & watch any video in full-screen then it always rotate as landscape. It's annoying. I want to see any video in full-screen as per my choice. Sometimes like Portrait wise & sometimes Landscape wise. But there has no way to do it.
In Opera Mini; it is ok. I can watch youtube videos in full screen in both Portrait & Landscape wise but here on Opera for Android; I can't. So, please take a view and add an option where those videos can be shown both Portrait & Landscape wise in Full Screen.

• Another problem is, on Opera for android if I click on any youtube video and then click on the Share button then it slides up a drawer like screen to share it on other apps. I mean why???
  Unlike Opera for Android, if I click on Share button from any web browsers in the world then it shows some option to share directly on many websites like Facebook, Twitter etc. And also there can be found an option to share the youtube video link as shorten.
  But here on Opera for android there has no option like this. I don't use Facebook app, but I want to share the following youtube video on Facebook right from the web browser, but there has no way to do it on Opera for Android. All it does & can share the video across installed apps. But I don't need it.
  So, please take a view about these problems and consider to fix those ASAP.
  Thanks.

In PC version of Opera there has an option to render webpages as per user's selected font. Like customize Serif & Sens-Serif font to render the webpages with those selected fonts.
But here in on android version there has no feature like this. And I don't like default font (Noto Sans) which was set & pre-defined by Google. Webpages seems ugly when it's rendered based on this font.
There's a browser named UC Mini that can use any font to render the webpages. If I place any font in the browser created storage (place a font in the browser created font folder) then all the webpages can use & utilize the font, and render webpages by that following font.
So, I request to the Developer team that consider to add a feature where we can use our own choosen font & webpages can render based on the customized font as like the PC version of Opera.
Thanks.

I'm also facing the very same problem.

Opera Mini has so many problems. Day by day it's getting worse.
Now it's bloated with totally dumb unnecessary feature like 'File Sharing'.
Can't able to block any single ad via Automatic & High saving mode and yet they claim it's an ad blocking browser.
Has frequent page loading problem.

@danher
Opera Mini's Ad Blocking problem still not fixed yet

The Full Screen Ad Page frequently nagging in Opera Mini.
Too much annoying.