Black/dark background (randomly) - Since Opera 72.*?

[salvuccino]

salvuccino last edited by

Hi,

pages are randomly rendered with a dark/black background, such as:

while the correct rendering would be:

Reloading the page does not help, also using CTRL+F5 does not solve the issue. The only way to get the correct rendering again is to restart Opera. That happens randomly, on different pages/sites.

Am I the only one to experience this issue?

Opera version: 72.0.3815.86

[salvuccino]

salvuccino last edited by salvuccino

It happens in a totally random way, and I checked by:

• Enabling / disable ad-blocker -> No effect
• Verifying if there were issues in the browser console --> No errors there
• Manually modifying the CSS associated to the element using Dev tools --> It triggers the update (see below)

It seems that, from time to time, the background is partially rendered as black, even though it is supposed to be transparent:

If I manually change the CSS via Dev Tools then the page is rendered using the specified color, otherwise reloading the page (with or without CTRL+F5) has no effect at all. It looks like, at times, the transparent color is mapped to black and only changing the CSS triggers an update. Unfortunately I did not find a way to reproduce this issue in a controlled way.

Note 1: elements displayed using a black backround have no explicit CSS that defines the background color. It's just the browser default for:

element.style {
}

Note 2: theme is set to "Dark".

[salvuccino]

salvuccino last edited by

When it happens, opening a new tab with the same address does not help:

Every new tab uses a black background and browsing the site, still use the wrong background color. Again, CTRL+F5 is useless in this case, it looks like it's an internal rendering error. Also in this case, there isn't anything in the CSS that specified a dark background for those elements.

If Opera is closed and re-opened:

[leocg]

leocg Moderator Volunteer last edited by

Is opera://flags/#enable-force-dark or opera://flags/#form-controls-dark-mode enabled by chance?

[salvuccino]

salvuccino @leocg last edited by salvuccino

@leocg said in Black/dark background (randomly) - Since Opera 72.*?:

opera://flags/#form-controls-dark-mode

Both of those settings are set to "Default (D)", i.e. they are both disabled.
This behaviour is totally random, but once that a page/site is affected, there is no way out other than restarting Opera.

I took a video, the background is supposed to be transparent, but unless it's explicitly set to a color, it sticks to black:

https://ibb.co/2s3DckZ

It seems that, at times, the browser default style for background-color:
element.style {
}

defaults to black automatically.