Slip in the transmission on 2006 Dodge Magnum

I have an automatic transmission with the slap gear stick. I have had it slip out of gear a few times when in 4th gear at 50-55 mph as I was slowing down and shifting into drive. Is this a common problem or something that I should be worried about.

Asked by for the 2006 Dodge Magnum
I would have a transmission shop look at this. This is definitely not correct