Three things I also have; 1- letters not writing. The keyboard has gone a step to the left, so the q and a are impossible to use. This was the first symptom. Also impossible to go to the beginning of a message. Turning the phone helps very little; aiming to the left and below sometimes helps, but very unpredictable; the keyboard is no longer centred / calibrated? Sometimes offers several different letters, even words and spaces, on only one careful touch. Have removed the screen protector, restarted in Safe Mode, restarted without SD card, emptied cache for the keyboard. Also tried to repair software using Xperia Companion; managed to restore photos, contacts and messages from my backup, but the desktop apps and shortcuts are totally trashed. All looks like a factory reset. 2- Big problem started when unable to unlock telephone with finger swipe. Also then unable to make any backup to PC via USB due to locked mobile. Solved in shop using mouse with USB connection to perform 'swipe'. Remember to remove lock afterwards. 3- Swipe still not working and yes there is that bounce. Cannot clear screen under Diagnostics, and yes there are yellow patches at the top and bottom of screen but only under Diagnostics. Several customers are having this problem, so I am confidant my screen is not damaged - especially as I have had a protector up tp now. Factory reset will be my final try before claiming on the guarantee. I expect Sony to provide answers so others are spared going through that.
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