I decided to use Studio 2017 to add 10 new language pairs to an existing server TM. In each case I first created the language pair and then imported the respective TMX file. I got all the way to the 8th language pair before disaster struck: All my new TMs suddenly disappeared from the TM view in Studio! I checked the server to see if they were there anyway, but to no avail. Frustrated, I started all over again. Incredibly, lightning struck twice, and all my efforts vanished before my very eyes. I ended up losing hours of work.

Is this a big fat error or is it documented somewhere that Studio should never be used for this purpose?