App Code Completely Disappeared... while still possible to create new instance of the app

It's the second time I've noticed this issue. The first time, I had a very recent backup, so I didn't mind. Now, I've lost a big chunk of data... App simply emptied. See by yourself:

"Free Screencast Recording for Gmail

Code will load properly from different device, using safari. So, obviously, something is going on on my computer. Let me know if someone has any idea of how this could happen. It happened only with that specific app, all my other app codes would open without a problem. Also, this is the only multi-page app. Renaming the app from safari allowed it to show again everywhere...

It doesn't actually appear that that app does anything. There is no parent child relationship with the apps you have displayed. Can you show the app properties for one of the apps using "manager"?

Thank you for your contribution! What you're stating is my whole point: the app has about 2000 lines of code but, at the time of my first post, it showed a completely empty app, with just one empty line. This would happen only from one computer but on all its browsers : Chrome, Firefox, Edge...

Once I opened the app from Safari on a different device, it showed all the code again and once I had added a slight modification and saved it, it'd show again on my main computer.

It doesn't seem the problem comes from Hubitat's, obviously, but I am wondering what in the world could generate such a phenomenon, just in case someone has an idea. Most surprising is the fact that it would happen only with this specific app, all other app codes would open normally.