I think I've had this issue in the last month or so. However, I think because I didn't notice it before because I had never experienced this on an automatic I probably didn't notice it until it had been occuring for a while.

I hadn't noticed what RPM the engine was at, but the problem usually happens either in a parking lot or crawling in traffic. So I would say I was applying just enough gas to crawl around 10-15mph. (Once I'm at highway speed I'm fine.)