Does it happen every time for you, or only randomly?
The best I can offer is that I copied the project from B128 to a fresh install of B129 rev 3 where it kept happening and then copied the project to a fresh install of B129 rev 6 and back to another fresh install of rev 3 because rev 6 had issues with saving files and it seems to be OK now.
Status changed from Waiting for information to Fixed
Thanks for the additional info.
We made some changes. Hopefully it will fix also that problem. I am closing the task.