After much testing, I think I have found a Tab behavior in the beta editor that a developer may experience while building a game.
When I am building a game, I like to utilize the tabs to give the player a place to go to check on things. I also like to rearrange the order of them. At the beginning of creating a game I will block out things that I want to do with placeholders that I fill in later. I began to do this with the tabs as well.
Well After much troubleshooting and going down a few rabbit holes, I discovered that if all the tabs I have created do not have a specific destination, strange things happen. If I were to put a working tab next to a tab that has no destination, then the working tab would stop working. Then gist of what I found is to always have something for a tab to point to if you want to avoid a lot of problems. I recommend making a dummy plaque for tabs that are 'under construction'.