HUD Overlay not showing if app is in Full Screen

Is it normal that the HUD Overlays are not showing up when using an app on Full Screen? I've tested with multiple apps and they all work fine when not full screen but no HUD Overlays show up if they are on Full Screen.

I'm using:
BTT 3.626 (1778)
Mac Big Sur 11.6.1

I'm also interested in this. @Simon_Rivet did you find out?

Unfortunately, no.

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