@userM8fesDK1Fd Have you tried clearing the cache partition on your phone?
That advice he gave you for clearing the cache partition is a really good thing to do for your system every few months or so.
Also really good to do after every software update.
Hopefully that fixed it for you, I would imagine it should.
But your issue also makes me want to share a suggestion.
You should check out the "g board" by Google in the Play Store.
I discovered it quite a few years ago, and have used it exclusively since.
I find it does everything the default keyboard system does and more.
Maximize the size in the settings, and it's a dream to use.
Check out the themes and color options to make it really nice on the eyes too.