I get white flash for less than a second when I open a page or F5 in certain websites

[GitAcc53]

Prerequisites

• I searched for any existing report about this bug to avoid opening a duplicate.
• I can reproduce this bug in a new, unmodified web browser profile with Dark Reader installed as the only extension.
• I understand I need to use the Broken Website Report template if this bug I am reporting occurs on a single website.

Bug Description

All modes have white flash bug. Though Static is the least annoying one, others flash like taking a photograph, static is less annoying but it's also buggy.

I get white flash for less than a second when I F5(refresh) in
any page from reddit.com with old design, old.reddit.com (with old in the url), rutr*cker, https://eksisozluk.com/ and certain other websites.
Opening these websites in a tab for the first time doesn't give white flash error most of the time. Problem is F5. After a page is opened, that Tab gets bugged I think, and I get white flashes from that tab if I stay in that certain website. So the first website opening in a tab is fine, after the first website opening, it starts to give me white flash in certain websites if I change the page in that website. But if I go to another website from that tab, it's hit and miss, sometimes there is no white flash sometimes there is if I go to another one of those bugged websites, but there is always white flash after F5 in those bugged websites.

It was fixed for a while #14376 than it got worse and worse. It only happened in certain subs before, now it happens in all reddit subs with old design. Here, Nba logos problem (another problem that I have but it's not a big deal, unlike white flash that is very annoying) was fixed but that fix caused more problems so I undid that fix.
I said turning off tampermonkey fixes the white flash behavior in this post but I turned it off now and it didn't fix it.

One other interesting website example is espn.com , https://www.espn.com/ is fine but a games boxscore page gives me white flash like this one https://www.espn.com/nba/boxscore/_/gameId/401810881 it's very weird.

Website Address

https://old.reddit.com

Steps To Reproduce

No steps required

Expected Behavior

White flash before the page opens.

Actual Behavior

No white flash.

Screenshots

White flash happens for less than a second at https://reddit.com/r/all/top/ with old design

than dark reader turns on at https://reddit.com/r/all/top/ with old design

this is from old.reddit.com , when the url has old in it, white flash doesn't cover the full page, it looks like zebra lines instead.

Operating System

W10

Web Browser name and version

Chrome/Edge

Dark Reader version

4.9.121

Additional Context

No response

[GitAcc53]

@Myshor can you check this post please?

[Myshor]

I checked that already. I see sometimes some white flashes too when I explore web sites with dark reader but it can not be fixed with sitefixes using CSS like I do most of the time here. That's why this issue was not commented by me earlier and no quickfix pushed for it.

You need to wait for someone who will be able to make some fixes into the deeper code of Dark Reader and find the cause why it's happening like described.

IMHO the pages are loading things dynamically and CSS styles are loading dynamically for them too. That's why some things are not applied "just like that" after page is opened. Not sure if this can be fixed somehow. Why? Because if we will try to apply Dark Reader changes before dynamic style is loaded they can be overwritten by dynamically loaded one and you will see more white parts than now.

One thing I can do here is just tag @alexanderby - main developer for the project. He can have more thoughs and ideas what can be the cause and how (if possible) it can be fixed.

[GitAcc53]

@Myshor I just checked, It's not just dynamic mode, all mode have white flash bug. Though Static is the least annoying one, others flash like taking a photograph, static is less annoying but it's also got this bug.

@alexanderby Can you help?