Perhaps a good idea to help nail down bugs would a general bug's thread, so that even though people might not be able to replicate it initially, it would be helpful whenever the same bug occurs more than twice to perhaps pin-point to what the common denominator is?!
Anyway, this bug appeared today. Has anyone experienced the same thing? I'll try the project a few more times, see if I can find something out..
https://vid.me/ucdN
EDIT: Ahaaa, perhaps it's due to real-time quantize being active, whilst trying to use slip-mode! Will try tomorrow