[Bug] Midi data outputted when freezing VST instrument

When freezing a VST instrument, Midi data is being outputted (at high speed) to external midi modules.

I’m triggering a Roland V-drum system and hear the drum part being played very fast while the ‘freezing’ process is taking place.

I can see no reason why the system needs to play midi data for instruments that are not being frozen while freezing a particular VST instrument is in progress.

Can this be stopped?