New Dishwasher not draining

I read lots of other posts about newly installed dishwashers not draining…but this one is a little different.

I installed my dishwasher. I’ve installed them countless times in the past (I move around a lot!) and have never had problems. Anyway, it’s not draining under the regular cycle. When I open it, there’s still water and suds.

BUT, if I hit then hit Resume/Drain, it drains.

Any ideas?