data lost, what now?

This morning I came to Zen that didn't have any open non-pinned tabs, didn't have some pinned tabs and essentials that I pinned yesterday, and did have some that I removed yesterday. :( It's like Zen's database somehow reverted to a point in time sometime in the past day or two.

I don't think I lost anything important, but it has seriously undermined my trust in the app.

Obviously this is not enough info to fix the bug, and I don't know how to reproduce it. What can I do to help get this fixed?

Also, If I sign in and use the "Sync and save data" function, will it help me if this reoccurs, or will it just sync the data loss?