Hi, there is a serious and annoying bug in Studio.
In the Models view ->> Text Editor tab - if you "accidentally" swipe your mouse left/right, it will move to another tab, and you will loose all the changes made in the Text Editor.
Normally, if you 'click" outside the tab, it will raise a warning message - but the mouse swipe is not captured as the same impact.
Note: this a using Chrome browser on a MacBook Pro with apple mouse.