When I tell an HC Squad to fast travel somewhere, and then start doing something else somewhere else on the map, whenever that fast travel is done, my map re-centers on my HQ.
This is particularly disruptive if I'm trying to fast travel many HC Groups to the same distant location. If the first ones start to arrive before I'm done, I just have to wait until the currently travelling groups arrive.
A similar thing happens when I attempt to fast travel to a distant location and fail (the game tells me I didn't click on a friendly base), so I have to try again, but the map has already recentered on Me.
(Just realized -- maybe this is just an Antistasi thing? Or does it apply to any Arma modes that use "fast travel"?)