Unreal game icons spilling over to internal image gallery

Hello
We are developing games in Unreal and install locally to test on a Quest. When we install a game get Image Gallery internal storage gets populated with generic Unreal icons, which seems to be related to the game we installed. A factory reset will solve this, but when we install a game again the same thing happens. What could the culprit be? Obviously the gallery app doesn't scan for images in games downloaded from the store. Is there any way to stop the gallery from scanning for images other than screenshots and videos shot within the Quest environment or installed in the proper directories from the PC?