I have 3 monitors. I have finder opened with windows on monitor 1, 2 and 3. The middle one, 2, is the main screen on the iMac.
As soon as the computer hibernates, the windows on other monitors are moved to the main monitor. This is pretty much annoying.
Attention because I am not talking about applications on other monitors. I have Photoshop on 3 and Pages on 1 and those never moves.
The problem is with Finder windows only.
This is my Spaces config.
This problem started on Mojave.