Wiper motor failed again!

I know that early A3 8Ps had a weak wiper motor and many have been changed under warranty, but has anyone who has had their motor replaced had it fail a second time?

Mine was swapped out by Audi Assist a few months ago, but the "service park" mode hasn't worked since.
My local Audi dealers have a further new motor on order to see if that restores the "service mode" capability, but I'm still waiting for stock to arrive and now my replacement motor has stopped working altogether again...

I can accept a failure and one replacement, but to have the second motor fail soon after seems very worrying.

Has anyone else suffered this double failure?

Nice man from Audi Assist came out from Manchester on bank holiday Monday and swapped the wiper motor again.

The "service" mode now works again.

He reckons that the first replacement motor must have been faulty for the service mode not to work, but its still a bit worrying that it lasted less than six months.....