They just released an update yesterday that fixed it. Dunno what changed, but when I checked it to see if there was any change, there was an update prompt.
It means that my insistence on using OSS software means I'm using a phone keyboard with an autocorrect that badly sucks. Just slightly less shitty than not having autocorrect - they've reached a perfect balance of crappy, but not so crappy that it's unusable.
I've corrected it. I meant "errors".
I'm actually looking forward to a decent mobile-usable LLM service, so that OSS keyboards and the like will be able to integrate non-shitty predictive algorithms.