Media Player MOD - doubled brightness

experiencing a weird issue: if MediaPlayer is routed to Video1, the brightness is pushed over… if MediaPlayerMod is routed to Video2,3,4,5,6 the brightness is as expected.

I confirm. Too bright on Monitor 1 only.
Video Monitor 1 shows brighter video while Video Director and Video Director Monitor shows correct brightness.

The brightness of Video Monitor 1 is depending to existance of other Video Monitors (2, 3…).

Video to the OBS goes correct.