​I am having a problem in Passwater Cove where almost every time I try to start an expedition the staff that I am trying to send just freeze where they are and don't leave. The staff end up in a state where I can't pick them up because they are supposed to be leaving, but they are doing nothing and their needs are depleting.

Sometimes I can cancel the expedition to unfreeze them, but other times it acts like the helicopter has already left even though it hasn't and only lets me cancel the expedition by destroying the helipad in the foundations menu.

After doing this to unfreeze the staff, starting another expedition usually freezes the staff in exactly the same way. Occasionally it doesn't though.

I am using the latest version of the game at the time of writing, which supposedly includes patches to the helicopter bugs that others have reported (besides staff disappearing, which isn't my problem).

In the save I have attached to the report I am currently looking at a frozen security guard in the Passwater Cove museum, so you should be able to see the issue.

Here is a link to the save. The uploader on this bug report doesn't allow zip extension files to be uploaded even though it suggests they can be:

https://drive.google.com/file/d/1UBLQXrWpwaexvDKdJ7v17EzKRUykzDmO/view?usp=drive_link