I use them a couple of times a week and remember the issue with doors suddenly closing occurring on my last two journeys at Piccadilly/Oxford Road. Today the inbound service to Manchester that would become my train home (
https://www.realtimetrains.co.uk/train/Y60073/2019/08/29/advanced) also sat down at Oxford Road for half an hour due to a fault and was terminated short at Piccadilly.
I've been on one within the last week or so where the doors have started closing, can't remember when, sorry. The problem of the doors is very much reduced, compared to how it was, but it hasn't been eliminated.
As to the one which gave trouble this afternoon, the relevant unit (195122) did manage to depart Piccadilly for Barrow at 1604, so whatever was giving the trouble must have been sorted. It clearly wasn't sorted in a flash, arrival at Picc had been 1529, and departure should have been 1548, but I can't say what happened to it between 1529 and 1604 as there are no shunt moves showing on RTT.
I have to say that, from a reliability viewpoint, 195s have, for me, been a huge disappointment. Forummers have been quick to point out how unreliable the 319s have been, but on a given day there are likely to be a much higher proportion of the active 195 fleet out of action than 319s. Okay, 319s are more likely to come to a standstill (since trouble with doors doesn't usually make a unit immobile) but the 195s have given trouble with brakes as well as doors, witness the four-hour blockage at Hunts Cross. As to trouble with doors, if the worst comes to the worst you can always boot the fare-paying passengers off and take the 195 to a terminus or depot ECS, but that's hardly clever.