R/R Front Shoe Hangs - 9 in Drum Brakes

ok...just started and can't believe what I am seeing. The R/R front shoe is hanging after several brake pedal depresses. Never seen this before. Return spring seems strong. M/C piston does not line up with shoe "tab" when this happens. Rear R/R shoe expands and returns normally.

Is the M/C bad?. Will tear into this tonight. L/R brake is OK. Car is jacked up on stands so I can see both L and R and make comparison. Spreader looks OK on R/R. I bang on shoe w/ rubber hammer and R/R shoe resets to anchor pin when hang-up occurs. Crazy!!!!!!!!!!!!!!!!!!!!

Ideas??? Comments??? Recommendations??? Thx MOPAR people.