mine did just this....parked vertical.....(nobody above has recently done this....i can tell from relpies....and i respectfully already asked richard this and he has been great to me !!!)
but this is a solution
with a little delicate wangling...you can unbolt the bottom of that plastic cover that covers the wiper motor
enough without taking all the stuff off......
and get in there with a wrench on that motor pivot bolt and loosen the bolt and re position the wipers...i may take a few times....but
its alot easier than taking off all the trim....and forget messing with the becm.....and this is so do-able.....