2012 Pro one purple line

Hello everyone. I use a 2012 MacBook Pro 2.7 I7 with anti glare screen. Running Sonoma on it for months now. Little slow but not enough to have issues. Just this morning I got a weird single vertical purple line on it. Restarted a few times and was still there but on last restart it went away. Is there a possible patch issue causing this or a hardware failure?