You can try to do some basic troubleshooting steps like safe mode and check if the issue will persist or not. In safe mode, your device only starts with software and applications that were already installed on the device. If the phone performance improves in safe mode, one or more downloaded applications likely have a negative impact. If the issue persist in safe mode, try the steps in this link they might help:https://www.sony.co.uk/electronics/support/mobile-phones-tablets/articles/00232845
Mine works but it certainly seems less reactive to hand waving, I always assumed it was due to my screen protector but I need to change that anyway so will test this.
