Hey Scott, thanks for the detail and context. We fix bugs on a daily basis and push updates to the Web almost every single day :-) this one seems a little more complex.
 
There are some strange edge cases on the browser on Windows devices, especially when dealing with external device inputs - we are in conversation with the Chrome team and have submitted a suggested patch for some of the things we've noticed - but we'll definitely check out this bug. I don't think there will be a simple fix, but we have both Focusrite and M-Audio controllers in-house and we'll get this checked out! Thanks for helping to make it a better product...

No, thank you.

Hi Scott, we've pushed a patch to production on the web for this issue, please could you try again and let me know if you experience the sustain problem again?

Are there forums on Bandlab, I couldnt get to them. -S

Is there such a thing as a Bandlab SDK? -S
 

meng
Hi Scott, we've pushed a patch to production on the web for this issue, please could you try again and let me know if you experience the sustain problem again?

Thanks Meng. I tried the online DAW again over the weekend and performance seemed to be very much better! Big thank you to your team. I was able to track a pretty sophisticated piano part no problem directly into the BandLab MixEditor. When I switched the synth over to a bass sound it still worked pretty nicely, but I did notice a very small latency flaw in the tracking of very quickly played notes. But this may be unrelated to the problem your team addressed. It just seemed like another issue unto itself. I don't want to give the impression that it had anything to do with the bass synth. I just think it was more related to the fact that suddenly I decided to play a much faster part (16th notes) and this revealed a little bit of latency. I think I could get around this by slowing the track tempo, recording the part, and then speeding back up to desired tempo. It tracked fine at a slower tempo. Suddenly my 1/16 notes are 1/8 notes and tracks better.
 
Hope that helps ... and thanks for the speedy fix!