High initial perceived velocity at arming

Whenever I arm my copter, I get a high initial perceived velocity, typically around 1.2 m/s. The value quickly decays to the true velocity after a few seconds. I am using a vision system, but it is not reporting any position changes during this time.

Here is a plot of the vision position message z position sent to the drone:

Attached are two logs where the issue is present.


Does nobody else have this issue? Or maybe people are just working around the issue by ignoring the first few seconds of velocity data after arming?