I have seen it with lemur, maybe using bespoke midi messages or standard, but you can send quite a few identical messages , this effectively clogging up the midi bandwidth, the same is true on A4 I think, I’m sure there are a few menus where there are limite options but the A4 kicks out lots of duplicate nrpn strings whilst the encoder sweeps between a few values, so it can happen and if you have a lot going on it might overwhelm the processor, just a thought