Hi Alex,
I just took a look, and it is v 1.4.2f1 for sure.
It's different how I select FSM's, sometimes through the Hierachy View, sometimes via Gizmo and sometimes just via click on the Gameobject in the Sceneview. I never used the FSM broser.
I am pretty sure this bug occured on every single way at least once.
I'm not playing while editing.
I never selected a Prefab in the Project View and edited it this way, if you mean this.
But almost every FSM is on an instance of a Prefab..
There's some weird thing I just recognized, I added a variable to my FSM and enabled the 'Inspector' checkbox to access it this way. Usually the var appears in the inspector right after checking this box. But it did not at this time. I deleted this var again, to try it a second time. But still no var in my inspector.
Then I saved and all my changes were gone..
I realized that every time where my changes were gone, there was this "inspector bug", too.
I hope you know what I mean...
Thanks a lot!
EDIT: Almost forgot, often when I create a new State via right click -> Add New State and then press Tab to edit the name, hit enter to confirm, the name is not saved. It is still named "State 1", and im sure that my cursor was in the input field on the right side, enter confirms and the input field looses focus.
Sometimes I have to make this several times until the state gets renamed.
Maybe the same issue?