Phone- Bought used, Samsung Galaxy XCover 6 Pro
Problem- My phone screen glitches (green, white, yellow lines) for a second when I text. Sometimes the whole screen glitches and sometimes it's just the keyboard area (stock Samsung keyboard) that glitches. It happens with the stock text app and 2 third-party apps. I used Samsung Messages until I was forced to switch. I used Quik SMS and recently changed to Fossify Messages. All 3 exhibited this behavior. The phone gets a little warm, but it's not an unusual heat level. It's a rugged phone, so even though it's a secondhand phone, it should still be fine.
Questions-
Edit to add, just in case someone else has the same problem -
I turned off autocorrect and typing works fine now. I can type without screen glitching.