While attending a top rope solo, MCI delivered, training course both myself and a fellow participant has a climbing technology rollnlock transition by accident from "progress capture" mode into "free running" mode.

This occurred when ascending ropes using two devices and two personal tethers. The two devices were side by side on different belay attachments. I believe one PAS rope, being used with a hand ascender, moved the rollnlock locking switch to "locked open / disengaged"

This was while ascending two ropes, bolt to bolt clipping to pre-rig a sport climb. Buddy and pre-commitment checks were A++.

This wasn't a failure of the device, but an interaction from the side that didn't affect devices with a different lockout mechanism (microtraxion, spoc etc).

The rollnlock was a lovely device to use when climbing. Without interaction of a PAS rope it did not end up unlocked.

Redundancy and checks are key. At no point was I not connected to two bolts - as the rollnlock and ascender were on the same rope. The ascenders rope connection locked out the rollnlock - I was still attached via the ascender.