I just upgraded to Komplete 13 and started to use Guitar Rig 6.
I like it very much so far, but I noticed that it adds few ms of latency, even without any component loaded, and this latency is not reported to the host (at least, to my DAW, i.e. Ableton Live).
So if it's used in parallel, it creates phase issues.
I'm using VST and AU version, in Ableton Live 11.1.5, on a mac M1 pro running Monterey, native (with AU) and under Rosetta...