Wow…I am really sorry to hear this.
I can only imagine how frustrating it is to dedicate so much time to working on something in Studio, only to have it thrown away. We will actively be looking into this.
We shipped a fix for an issue last week related to data loss in Team Create. I want to see if it could be related to that issue, with perhaps just unfortunate timing. The following questions will help us determine that.
Were there packages in your place?
When did the data loss occur?
When did you notice the data loss?
How long does a typical team create session last for you/your group?
What type of data was lost? (Script source, Parts, etc…)
Were there other editors in the team create place at the time the place should have been saving?
Is so, were their changes lost as well?
Did you notice anything in the output related to successful saving or saving errors?
Again, we are painfully sorry that this occurred. As an additional request. could you DM me the placeID? I doubt we will be able to recover anything on our end if the issue was related to the team create server, but it never hurts to take a look.