In my host Renoise , we have the option to render a note to sample ( this is an offline process and is basically a bounce function )
Whenever a note is inserted that triggers microtonic and rendered to selection ( not using the built in sequencer ) , the rendered sample has 1 to 2 milliseconds of silence before it
Afaik , this did happen with the previous versions
At the moment I am using the demoversion of microtonic ( awaiting license transfer )

Microtonic has a buffer-size and latency of 64 samples that is reported to the host and should be compensated properly when rendering to audio. Is there a setting for latency-compensation in Renoise?

We have not changed this in many years.

There might be a slight inaccuracy when triggering via MIDI but this is usually down to a few samples only (in 44khz). I.e. microseconds, not milliseconds.

Right , I see
Plugin delay compensation was turned of , hence the longer delay
When turned on , the time is 0.8 ms

It is still too much imo and I wonder why. In Ableton for instance I see a few samples delay max. That's like 0.05 ms. The attack in your screenshot does not look sharp enough. Is the attack-slider all the way down for this test? Also, turn off any eq when you test as there is always some group delay in minimum phase filters.

Oh boy , indeed the attack slider wasn't completely down
With plugin delay compentation on , it's about 0.1 ms ..good enough for me.