[OPEN, WITH A WORKAROUND] Ambulances Stuck

My ambulances are stuck. Discovered when I got messages about patients waiting too long and leaving, however, they were not in hospital but instead waiting for ambulances.
No mods but Doctor Mode and Hospital Services DLCs on. Playing on a sandbox level.

Unfortunately, I do not have an autosave where the ambulances aren't stuck.
I think it might be the outbound grey ambulance that is holding up my red ambulances. Might have to do with the one Trauma Center which has lights on but nobody in it.

Hi, thanks a lot for the report and catching this particular case - also, welcome to the forum!

First, good news, there's a workaround: if you delete the second trauma center (the first dark one, both equipment and the room marker on the floor), the gray ambulance will get unstuck and the other ones should start working as soon as it leaves.

A quick explanation: we unfortunately allowed extending the building one tile too far, the ambulance needs one row of free tiles behind it/next to it to be able to spawn a stretcher.

Thanks for the workaround