Hello, I recently set up a third monitor and distributed my c4d interface across them, viewport on one, timeline on the other, and most GUI panels on the third, as soon as I enabled this third monitor, my interface ground to a halt.
The viewport updates fast, as normal, however, as soon as click anything on the interface (on any of the 3 monitors), like an object in the object manager or timeline, or an item in preferences, or basically any interface button, C4D freezes up for about 10 seconds before calculating what I clicked.
Switching back to 2 monitors everything reverts to functioning normally and being very responsive.
specs:
Win 10 pro 64x
2x xeon E5-2620 v4 @2.1ghz
64gb ram
GTX 1070 ti
Cheers!