We have a GE WBVH624HWW washer that had a similar issue. It would stop during the drain cycle and flash the stop/start button. Hitting start again usually continues the cycle, for a while, and it tended to stop again.

I pulled off the lower service cover, drained the water and removed the front drain, found small rocks, lots of lint, even bandages. We have kids that leave anything and everything in their pockets. After cleaning, it still wasn't draining.

I removed the drain pump assembly, disconnected the pump, and reconnected the leads. On a drain cycle, the pump spins as expected. When I attached it to the assembly and connected the hoses, it tended to lock up and get hot instead of turning and pumping water.

I can't see anything in the assembly that could prevent it from spinning, and now it seems to be working fine. A new pump assembly is maybe $150, though our home warranty deductible is only $75. If the issue isn't consistent, I've thought that maybe the pump motor is going out and working intermittently.