Doesn't show/hide automatically on android 10ish oppo device

[spacelama]

I think I have all the recommended hacks on to get Velociraptor to display (background running, accessibility service, pin to recent apps, etc), but the overlay doesn't display when going into one of the whitelisted apps. I can select the permanent notification->show button, and it shows, but permanently. When I drop out of a navigation app, the overlay is still there. I have to go back to the permanent notification->hide to get it to go away.

I suspect it's specific to this device given its crappy power saving modes, and because a recent version worked fine on my previous device.