It seems like a bug to me.
I have some stereo instrument plus two mono audio tracks to connect external instrument hardware (a DSI tempest drum machine with MIDI, stereo out and some mono outs). If i switch to "low latency monitoring" the mono audio tracks are not audible, while the level is there on the meter trough to the master track. This makes no sense to me and low latency monitoring useless.
There are no plugins placed.
I tried to switch auto input monitoring etc..
many thanks for a solution!