Some time ago a change was introduced to Ekos CCD, which removed parking a mount when a session is finished. Is there a chance it's returned to the CCD tab? In many cases users don't use the Scheduler (where parking a mount is available), but instead just setup a session in Ekos CCD tab. Without this option one needs to manually park a mount after session completes and if not a mount continues tracking an object indefinitely. This can cause collision of OTA against mount in some cases if not stopped on time. Well I admit it has happened to me recently, because I have not waken up on time and my mount continued to track after session has been already completed :-/
Well, I guess you can use a "trick". Add one frame of flat/dark at the end of your sequence, and from calibration options, select "Park Mount". I haven't tested this but I believe it could work.