Photoshop drawing random lines on its own during strange glitch

[LunatiqueRob]

I've been dealing with this for a few months, and I have no idea what's causing it. Basically, without warning, Photoshop will draw random lines on its own, and it'll last for about 3 seconds or so, and there's nothing I can do to stop it until it's finished. You can see in the screenshot it's straight lines that seem to go in random directions. This happens at irregular intervals. Sometimes I can work for a whole day without the glitch. Sometimes it will happen a few times a day. 

At first I assumed it was the Xencelabs tablet I recently bought, and I've been in contact with their tech support. We wondered if it might be EMI (electro-magnetic interference) due to the USB hub, power strips, and other electronics in my studio. They even sent me a replacement unit. But today, the glitch happened even when the Xencelabs tablet and Quick Keys remote control units weren't turned on (although the wireless dongle was plugged in), when I was only using a mouse. I have no idea if the wireless dongle on its own could cause a glitch like that, and now I'm starting to think it's something else. I only thought it was Xencelabs because the glitch started happening after I bought the tablet and quick keys, but it was just a coincidence because the glitches only happened when I was working in Photoshop, and if I'm working in Photoshop, I'm usually using a tablet. 

[jane-e]

@LunatiqueRob 

This is strange and I have no idea. Can you show us a more inclusive screenshot with:

• the Tools panel: select the tool that is selected when this happens
• the options bar for the tool
• the History panel showing the history states
• the Layers panel

Jane

[LunatiqueRob]

The tool doesn't matter. It has happened in the past when I was using the paint brush, or while using the Liquify filter, or using the healing brush. 

[TheDigitalDog]

First, try disabling GPU in the Preferences (Performance tab). Any better?
If turning OFF GPU works, it's a GPU bug and you need to contact the manufacturer or find out if there's an updated driver for it. 
Also see: https://helpx.adobe.com/photoshop/kb/acr-gpu-faq.html

[LunatiqueRob]

I have a new Zotac GTX 1660 Super 6GB that I bought in Feb this year. I've kept its driver updated as soon as new versions come out. I'll try disabling the GPU in Photoshop and see what happens.