It started doing the keyboard thing quite a bit last night. Got fed up and restored it back down to 18.1.1. It will be a while before I get it set back up how it was before, but so far no keyboard glitches. We'll see about the home screen apps. I think no more betas for me. I think the betas might introduce problems that then aren't necessarily solved by updating to the public release. Whereas maybe staying public to public might keep the issues away.Honestly, if I were you and was having as many issues as you are, I’d restore my iPhone with iOS 18.2 the day it’s officially released (December 9th or 10th), and install your apps one by one. If you think it may take you time, you can do it during the weekend.
I made a clean install of iOS 18.1 and I’m not having any of the issues you mention. Actually, it runs great and smoothly and efficiently on my iPhone SE3