(Pixel) spell check not working, autocorrect disabled but still replacing

[chawke]

Spell check often doesn't work in Keep Notes; no red lines appear under misspelled words, even after restarting the phone. The following are enabled:

Gboard > Text correction > Spell check

System > Languages & input > Spell checker

Also, it seems words are sometimes autoreplaced although the following are disabled, and I'm pretty sure I didn't accidentally tap the suggestion strip while typing:

Gboard > Text correction > Auto-correction

 

[Kizzy Catwoman]

Trying clearing the cache in Gboard and set it up again.