Plane SITL aircraft starts with velocity

I’m running a SITL build from the “plane3.9” branch (not master) and the vehicle starts with a forward velocity after initiation. So, it isn’t armed, but has a forward velocity. I’ve run it through both and straight from the executable from the waf build and each has the same behavior. Images below: to Mission Planner:

Executable output in cygwin window:

Is there an easy way to stop this? Seems there’s likely a simple solution to this, but I haven’t been able to find anything in the forums/docs.