I am having this same issue!
I return to find the dishes are clean, but there's water in the drum and the start/resume button is blinking like the cycle was interrupted.
When I hit cancel and close the door it seems to drain just fine.
I cleared my drain lines (which REALLY needed it) and checked for obstruction at ports, but the issue remains. I thought maybe faulty drain pump - but it drains when prompted by the cancel button.
Then I thought perhaps a problem with heated dry cycle; but if that's the case it should still drain.
I'm stumped & don't want to troubleshoot by buying/replacing parts.
Curious: I go through a couple of thermal fuses a year... do you as well?
Won't buy Kitchenaid/Whirlpool ever again.. SO many problems with dishwasher & refrigerator -finally just replaced K-aid microwave.
If anyone has resolved this or has suggestions on what to try.. please pass along!