Torque Converter neutral position?

[tomanythingstodo]

Hi guys, I have a 2004 Hemi (2500) automatic, while the engine is still cold, if I put on the brakes to stop, like at a light or stop sign, the truck feels like it won't go into a neutral position and will stall. I need to let up on the brake for a second or two and it will then finish finding a neutral position. The truck takes off fine and once it's completely up to temperature, it down shifts to neutral fine. I had the tranny fluid pumped out and changed about a year ago and it looks good.
I'm open to suggestions or thoughts as to what's causing this.
Thanks for any help in advance!