Yep, the terminals are geofenced so that if Russians get ahold of one and torture passwords out of a Ukrainian they still won't work in Russian-held territory. This means they won't work in Crimea at all, and when battle lines are shifting rapidly on active fronts there's a delay from when Ukraine can tell SpaceX they've regained control of territory and when SpaceX can propagate the new geofence info to terminals. This is likely only a problem where Ukraine is making rapid progress, which isn't along the entire battlefront.