I just tested moving the ecoflow to another room (both door closed ~5m between the ecloflow and the monitor) and used an extension cable to power the monitor.

I just tested moving the ecoflow to another room (both door closed ~5m between the ecloflow and the monitor) and used an extension cable to power the monitor. The issue is still happening. Unfortunately I don't have a different HDMI cable at hand now. I'll test another cable as soon as I get my hands on one.