Bike "jumps" into gear

[pirate]

My Nomad has been doing something since I bought it new in May, and I thought I'd ask you all about it to see if it's a problem or if it's normal.
Whenever I take my first ride of the day, my bike will slightly "jump" forward when I shift down into first from neutral. I still have the clutch fully pulled in, and it just kind of rocks forward. The Nomad only does on the first ride of the day. Once the bike is warmed up, it doesn't do it the rest of the day. Do I need to let the bike warm up longer before I take off? It usually runs for about 45 seconds before I take off.
Is this normal, or do I have a problem? None of the bikes I've previously owned have done this. Thanks everyone.

PC