Keyboard slow respond time when using instruments
My Nektar Impact LX88+ appears to respond poorly when I load a virtual instrument. When I create a new "Software instrument" track, it appears that all midi signal goes in and is registered without delay, but when I load something (like piano, strings etc.) it takes 1-5 seconds before anything responds from my keyboard. This goes for faders, keys, knobs and so on.
I've tried a different keyboard and it works fine with no delay combined with virtual instruments. I already know this isn't a recording latency related subject.
Is there a reason why my one keyboard won't respond well when an instrument is loaded.
iMac 27" 5K, macOS 10.15