OK, so ive had some time to experiment with all of my devices disconnected, laptop on it own, nothing plugged, this issue does not happen!! as of yet, usually it happens instantatiously. im 20 mins in and scrubbing away.
Connected devices, Thunderbolt = UA Twin 2 Duo, MIniDisplayPort = Dell Monitor, USB = Mouse, Wacom, Logic Keyboard, Hard drive, Midi interface, Monome, usb - ethernet adapter, thats all i can think of off the top of my head. Does this ring a bell to anyone, sounds like a bug in logic to me, no other apps have this, guess ill have to find the time to test one by one. Thanks