u/Brave-Ad9743

Running an M3 MacBook Pro in clamshell mode connected to an external display via HDMI.

Sporadically the display goes completely black for about 5 seconds, then reconnects but I'm back at the lock screen and have to sign in again. No pattern to when it happens, sometimes once every few hours, sometimes 3 times in an hour, sometimes not at all for a full day.

Has occured on 3 different monitors. Happens with HDMI plugged directly into the MacBook, with HDMI going through an Anker USB-C hub, and also with a USB-C to HDMI cable. Power cable is solid, not being bumped or unplugged.

Anyone seen this?