Keyone problem: out of control screen - split screens, tiled apps

Hello: I've had my Keyone for about one year. I don't have many apps, just the basics: maps, weather, calculator, etc. Only Hub runs in the background.

My screen suddenly went crazy with a mind of its own. It randomly and rapidly opens and closes apps and I have little/no control over what I can open/close. Split screens and tiled apps which I can't select or close. Renders my phone virtually useless.

I've rebooted repeatedly, tried safe mode, cleared cache, etc. Please help if you can!

Duplicate Thread ... Mods lock her down

try factory reset?

No factory reset yet--saving that as a last desperate measure as I don't want to lose any data. Not all data backs up to the cloud so would prefer not to have to take tha chance that I didn't separately identify and backup everything that isn't included in the backup option. I already lost data when switching from my Bold to my Keyone and am still trying to recover from that! ;o Any options to try before taking the factory re-use plunge?