@sun @feld reminds me of a thing that happened to me years ago, my phone died so I was using another one which was actually someone's old phone that they gave me when they got a new phone (as people often do, I have a bunch of old working spares lol). So I'm typing "in" (like "I'm gonna be in..." and the first suggestion is "in the ass".
That thing is Android 5 iirc so these thing have definitely been "learning" what you type for a long time lol

Also https://mrhands.horse/notice/AmbFnJy4kzfV2ETmoi