Variations of this issue crop up all the time. A few things you can try:
- Killing her, taking a long rest, then reviving. A long rest usually "finishes" events.
- Killing her by jumping down a bottomless pit. This will automatically teleport the body to your camp, where you can try reviving again.
- Changing locations. Jergal's crypt, a cave, et cetera. Would she teleport back to the overworld map? Optionally try killing her while not on the overworld map.
- Getting into a fight. Considering she teleports back when you stop controlling her, forcing her into TB mode/initiative queue might unstuck her.
Honestly though, It might be for the best to just load a previous save. You're near the beginning of the game, and should've gotten an autosave after landing on the beach, so you won't lose much progress.
