Text box does not show text when using PiP

[Lc9R]

I found more issues with pip if you tap on the window, for example if you want to move it, it freezes the game untill you tap on the game then it continues like nothing happend

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That's probably because it acts like you have switched between apps, when you switch between apps, the game freezes, so the same thing happens with PiP as well.