Hi @yeshy I'm still not able to understand the issue here or the steps where it deletes your tabs.
Could you please share a video where this happens?
(Note that we have changed nomenclature every from "Window" -> "Tab Group" to distinguish between actual macOS windows and our concept of a group of tabs)
When you open Orion, the default "Tab Group" that opens is a temporary tab group - i.e. it will not save your opened tabs if you close the window (this is the way it is intended to be). When you save this temporary tab group by right clicking on it and saving it, you will have to name it and it will then become a saved group which will save your tabs even if you close the window. If you create a new Named Tab Group by clicking on the + icon, it will also remember your tabs across window closures.
I hope this clears it up! (Or maybe I have misunderstood the problem, in that case please share some more details. A video of the issue will be very helpful).
