Just reading this thread as I had a 'gear unavailable' today.
I was doing 40mph, in 40 zone of course, and the lights changed, conscious of red light camera in the area I decided to anchor on, a lot more brutal than I've ever done before, always felt the QP's brakes were a bit ineffective but give 'em a good press and they certainly aren't!
Anyway, as I stopped I saw on the panel in front flash 'gear unavailable' - I was in manual non-sport mode, usually let the box change down itself, to be honest I anchored so quick no time to even reach the paddle anyway.
Drove away ok, no issues. Suspect I anchored so quickly it didn't have time to change down properly, but thought I'd ask in case....