Yes, but that's what I'd do with any system. It's the nature of putting a carbonated liquid into an open container. As well as venting the keg before filling. Chilling the beer and bottles before bottling time minimizes those losses, though.
Normally, I have the beer at a good carb level at serving temp. Then I chill it down to near freezing and hit it some more with gas. Let it sit a day or two, then fill.