2011 RR SC Wipers stopping half way across windscreen
 

Took the RR out during a very rainy day over the weekend with everything working fine and toward the end of my hour journey the wipers just suddenly started stopping half way 'home'
the operation of them is fine in high and low - they travel all the way
intermittent mode has them stopping half way between wipes
either way though, then the wipers are turned off they only return to half-mast.


has anyone else encountered this and aware of a (hopefully simple/cheap) fix?

regards,
Matt