I came across this issue about a month ago, I’d like to report this bug as it can cause physical harm, alongside “freezing” the client.
Pressing ‘F12’ and ‘F11’ on the Roblox client sometimes will repeatedly flash the game window, alongside making it impossible to close without Task Manager. This bug occurs rarely, but it is easily reproducible.
Windows 10
NVIDIA Geforce RTX 4070 SUPER
AMD Ryzen 5 3600