[gtCameron]

I had that same issue with multiple monitors a year or two ago. Tried everything, reformatting, different OS versions, etc.

Turns out it was one of my mini displayport -> hdmi adapters, replaced that and everything was fine.

[smsx]

I had the exact same issue with a 2017 13” MBP. Switching from one of those tiny usb c hubs to a full fledged dock with external power solved it.