Looks like this is related to my issue reported here:
Appears only in the latest update of the browser.
Hi. There are some key differences between iOS and Android devices. We can't neglect them and applications need to adapt somehow. One of those differences is the back navigation. On Android you always have access to application manager, home and back button. You can use that back button to navigate back in history - you don't need to reach 3 dots menu.
On iOS you have built in navigation gestures (swipe from left and right edge to go back and forward), but it's convenient for all users, thus we decided to put back navigation in the FAB menu. This however meant we had to remove Reload action.
If you don't like vibrations, open settings and turn them off (this is android specific feature).
Posting about your problem
After have done the steps above and confirmed that the problem is most probably in Opera, it's time to post about it.
Start the topic with a title that briefly describe the problem so people will know about what this is about.
Don't try to explain all the problem in the title.
Use tags to make it easy for other users to find posts about similar issues. If posting about Opera Mail then add the 'Opera Mail' tag
In the post (body) you should include the following information:
Your OS (Linux, Mac, Windows)
Your version of Opera
If the problem is with a page, a link to it
A screen-shot of the problem if it's related to something not showing as should
A description of the problem, including as much as information as possible
Steps to (try to) reproduce the issue
Expected behavior and actual one