Problem with my frame

Hi! I have a problem with my frames. I was working on an Android prototype when suddenly some of my frame kind of disappear.

I can see the frames name on the list as I did before, and all the component inside, but it’s look like the background is not there anymore and I have problem with seen that frames on the prototype view. Does anyone know what could have happened? Thanks!

The obvious thing to check is of course if you accidentally removed the background color, or hid the background element.

I see you’re using the mobile app. I have this issue where content just dissappear when I zoom in, especially in complex files. Do you have the same issue on a computer as well?