BETA version -- 5.0.1002.182

[Admini]

Does it have the same issue in Google Chrome if you have these extensions installed?
If true, this is a bug of Dark Reader/uBlockOrigin itself.

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No. Both apps worked flawlessly in Chrome, Ungoogled Chrome, and other versions of Chromium.

Both apps confirmed that there is an error only in Cent Browser 4.3.9.248 and 5.0.1002.182. (I didn't check the old cent version.)

Maybe you have enabled the option "User custom background color for web pages" in chrome://settings/cbBrowsing?
Please try resetting Settings in chrome://settings/reset
If the issue persists, you can try installing these two extensions in our safe mode(a command in Alt+F menu).