Greetings folks! I have been noticing some strange behavior on my MacBook Pro recently. It started about three weeks ago, I would intermittently get a diagonal line going from the top left to bottom right of the screen. The line would flash for a second and then disappear, seemingly unrelated to any action I was taking. This occurred for a few days then stopped, so I hadn't thought about it much since then. Starting today, the line has reappeared, especially when I am working in Photoshop. I was also able to take a screenshot of the issue which I have attached below. What seems odd to me is that 1) the line was actually rendered on the screen, otherwise the screenshot wouldn't have captured it (I think?) and 2) it seems to only occupy the active canvas in Photoshop. When this issue occurred previously, it was not relegated explicitly to Photoshop, but today that is the only program in which I have noticed it. Does anyone have any ideas as to what might be causing this issue? I would greatly appreciate the help.