There is a forum for this: https://community.fantasyflightgames.com/forum/572-x-wing-squad-builder/

3 hours ago, AceDogbert said:

Yep, my Hyperspace lists have all been removed again.

Not the end of the world, but I wish they could update what is/is not Hyperspace legal without wiping out the lists...

Then they'd need other features for the saved lists. They'd have to have some facility for checking a list and telling us it is no longer legal in the format it was created for. That would then need to inform us of perhaps why the list became illegal. Easier just to wipe them all out.

I think the squad-builder should tell you if you made an Extended list that is legal in Hyperspace. It should tell you if a list has too few or too many ships.

You log in and get a notification if the points changed or things available in a format changed.

I mean it isn't like they created the app with the intention that points and upgrades slots would be changed from time to time is it? Why would features informing users about such changes and the effects of such on their saved lists ever be a consideration? 🤦‍♂️