I've been looking for a octavia vrs for a while and it seems like the rear wiper blade are always stuck is this a common problem?

My 18 month old car has needed two replacement wiper motors (under warranty) in the past 4 weeks.  So, yes, there does seem to be a reliability problem caused by bad design.  Still, at least my car has been cleaned inside and out for free twice!

 

Do a search to find many posts on the subject of rear wiper motors.