If you can reproduce it, please log a support call so we can get this issue to the right people. No longer beta. I don't know what is causing but did find a workaround. It might lead to fix. I removed the addin/addins I am trying to use. from the add-in manager. The selected the options tab in the add-in manager. I added the search folder for my add-in (one folder above) and it put my add-in into the shared add-ins section in the add-in manager. I then was able to go to customize and I had an add-in controls category with my addin in it.
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