I don't know if this is a known issue. I'm using LingQ on my iPhone 13 Mini to read Korean. If I tap a word, its definition will pop up no problem. But if I don't like that definition and want to change it or double check Naver etc and so I tap the definition to bring up the menu.. well it works but when the new screen pulls up it FLICKERS something mad for a few seconds. Every time. This is very easy to reproduce. I even made a quick screen recording.