Screens vanished from the project, even after favoriting them

I had created a project on stitch, and made a lot screens and had favourited the final ones as well. I had kept this favourited screens separate as well, While developing a new screen, stitch froze and upon reload, many of my older screens/designs vanished. I can see the prompts, but its not showing the screens anymore.

Hey @Nav_Sun, sorry for the trouble. It can be a bit challenging to manage your workspace when you have a large number of screens. Could you please try Shift + 1 to zoom to fit so all screens are visible? Regarding your work, your older designs will not be deleted unless you remove them manually. Please also try refreshing your browser and logging back into Stitch; it sounds like a minor glitch. Thanks!

Thank you for getting back, I had tried all this on that day itself and it still did not show up. I did not manually delete the screen. Infact I had favourited them, when i was creating a new screen, it was processing for a long time and the screen froze. When i refreshed the screen, the other screens along with the new one disappeared.
When I click on the prompts which were relevant for each screen, the actual screen shows up for all the screens, except for the ones which disappeared.