I was having a flashing square on my screen on one of the maps and it's a major bug you should squash because it will trigger someone's epilepsy. It seems to be tied to the viewmodel, because I use inverted viewmodels on Pyro, and it diminishes but does not fix this glitch.

This was on my screen when I connected to the server (after Casual). It was warping with other yellow colors and I can only guess it's tied to the VScript.

Switched teams to BLU and it blinds me except other players. Inverting my viewmodel with "viewmodel_fov -360" removes this, but goes back to the first picture depending on the camera angle.

At the end of a round in particular, this white square was flashing violently on my whole screen (not just this small part) and I had to look away.
I do enjoy the VScript by the way. It's a lot of fun and plays pretty well. Also, I witnessed someone chat they had the same issue in a different server and VIP map.
Would like to also note that restarting my game fixed it and seemed to restore the HUD for the Mobster compass.