Here, I set the backdrop for all devices, which as I said does not work on mobile.
The menu panel is done here:
I’m not sure what I’ve done wrong here, as in the screenshots it only works on some elements on mobile, and on desktop it only doesn’t support that one thing on Chromium in specific - having no issues on Firefox.
Update: It seems like blurring the header causes this, but as I said only on Chromium again.
Update 2: I forgot to add webkit to the background - could that be causing it?