I've seen other users ask about this but I haven't seen an answer that solves the problem.   When  I add a Kontakt plugin into Bandlab it works fine no matter what the particular plug is.   If I immediately record it in Bandlab all is fine. Later it seems like all bets are off.  The playback of the original recording is generally fine but there are intermittent issues doing other tasks.  If I just click on the MIDI plug in again at a later point and play my input keyboard I may hear nothing