rncbc.org a.k.a. Rui Nuno Capela

OK, I could grab it now.

Well, this is a qranger session alright and trouble is I can't test or reproduce this ATM. I don't have a working qranger environment for just that. I'm afraid the behavior you report, delays, glitches or hiccups while changing chords, is very specific to qranger if not exclusive to it. I just can't address the situation from qtractor debugging POV.

However, if you can setup and reproduce an equivalent scenario or procedure the issue arises in qtractor (not qranger), you're more than welcome. Please take note of all the steps and manners that you take to reach any evidence. Otherwise we're simply doing guesstimations :)

OTOH, have you reported the issue to Lionstracs?