Having firefox as auto-fill app doesn't work

Hi, I use Firefox sync for my passwords, and it fills in usernames/passwords as expected in firefox. On my previous phone (stock android), it also worked nicely as auto-fill service for other apps.

On /e/, OTOH, I sometimes get a little “Search firefox” (or something) icon, but when I press it, it doesn’t seem to work. I have toggled Firefox’s “fill in other apps” setting to On.

Does anyone else have firefox working as auto-fill service on /e/?

A little extra testing… I do get up the “Search firefox” button just over the keyboard, but when I press it it sort of blinks, but doesn’t work.

Btw, I also use anysoftkeyboard, so that might be related.