Black box in context menu when selecting text in input

Hi guys, I’ve tried everything and codes to try to eliminate this black box bug in the context menu when selecting a text. My app is a pure HTML, CSS, JS SPA. I use Android Studio, I’ve used several AIs but without success, I’ve tested 3 cell phones, I’ve updated the capacitor, has anyone managed to solve this? It only happens in the app, because in the web browser everything opens normally.