I have yes, only happened after I finished the game. I couldn't open the garage at Michael house and none of the cars were parked on the drive, Michaels car was parked on the road.
Oddly enough after about 6h (real time) everything was back to normal.
I had 3 highly modified cars in Michaels and the Bugatti in Franklins. All flipping dissapeared - was SO annoyed and none were in the impound.