It only happens on the lfgss though, actually it only happens in the comment editor. Can't say I've compared to another text entry field. Doesn't really bother me, just seems odd.
The text field here is just a textarea, a primitive HTML form field.
There's really nothing special going on and the code here hasn't changed in years. I'm curious why it's happening, but I don't think it's this site doing it.
Nothing to do with this site... You've installed something or configured something on your phone.