I have a floating menu that has a webview button displaying a stream from a camera via frigate/go2rtc.
The use case is when I get a notification that someone is on the driveway i can trigger the menu to display and then see who it is.
When I close the menu and then reopen it again, I can scrub back through the controls for however long it has been since i first opened it (in one case I had 57 hours of footage I could scrub through!)
I do have "keep active in background" not ticked, but it is clearly keeping it active in the background 
perhaps the wiring is not linking the frontend ui to the backend magic
Before floating menus I used floating webview to do a similar thing, that does clear itself each time you open/close it.
Does that make enough sense to see if you can reproduce? or do you need more info?