`edge://flags/#enable-force-dark` broke PDF dark mode plugin

edge://flags/#enable-force-dark works well, but it does not support PDF.

Moreover, it has caused a plugin called PDF dark mode, which used to work properly, to become ineffective.

Is there a way to solve this problem?  I'd like to enjoy the comfort provided by both.

Alternatively, does edge://flags/#enable-force-dark  plan to support PDF?