When I click on the Collab button, the drop-down that appears always shows the same content as when I first launched Unity. It does not update to reflect changes that happened during the Unity session. If I launch Unity with some local changes, I am invited to publish those changes. After I publish, the Collab button updates to show I am now up to date. But the contents of the window does not update. It still shows the same changes. In this screenshot you can see that the Collab button has updated and now shows a green tick – I am up to date – but the drop-down has not updated. The 3 changes listed have already been published and should not be displayed any more. If I add new files or change other files, they do not appear in the drop down either. If I close and reopen Unity, the drop-down updates, and I can publish my next set of changes. But the same problem happens afterwards: the contents of the drop-down never changes until Unity is closed and re-opened. Here is another example. I opened Unity with no changes, then made a local change. The Collab button correctly shows that I have changes, but the drop-down does not: More details The problem seems to happen in Unity 2017.1.0f3 and 5.5.1f1 I tried reloading the Colab History view. It does update the Collab History but does not update the Collab button drop down. I tried viewing http://localhost:38000/unity/service/collab/localChanges - it seems to show the correct state (same as the Collab button), not the incorrect state shown by the drop-down. This problem occurs on Windows computers. The affected computers are at a university - there may be something unusual about the setup because it's a shared environment?