Firefox has issues with text input

Ever since a recent update the Firefox app for android has had issues with text input for me. It's ''only'' Firefox, nothing else on my device has this issue, and it makes inputting text a huge hassle. It often seems like the cursor randomly will move into a word even if it shouldn't, or it will trigger an auto-complete partway through typing a word (despite me having this disabled). It especially seems to happen if I go back to correct a word that had a typo or if I'm typing something with a hyphen, so "level-headed" will become something like "level-level-head-lehvel", as if it's repeatedly trying to autocomplete from different parts in the word. This seems most notable if I access sites that I have saved to my homescreen for easy access (such as Tumblr, since I don't use the app), but seems to happen at random in general. It makes text input pretty frustrating, which is a probem since that's a primary thing I do online.