Quick fix and it worked. Thank you for the "Clear Input History" suggestion. Found it exactly where you said and it behaved the way you said it would. But most importantly, it solved my problem. Been using my Moto Q9c for well over a year and it's been a work horse. 3 days ago my phone started to do things identical to the initial post. Letters not appearing during texts. Unlock freezing the screen. I hadn't introduced any new software to my phone. It's properly updated. I deleted my temp internet files (actually never did that so they were massive), but that didn't help. Then tonight I found this old post. The suggested fix of clearing input history worked for me immediately. I'm able to lock & unlock the phone again and it's moving consistently & quickly. Thanks again!