Prototype Height Resets When Clicking in Figma Slides Editor

I’m working on a presentation that contains several prototypes. I’ve set specific widths and heights for the prototypes so that I can scroll inside them.

However, when I click on a prototype in the editor, the specified height is randomly removed, and the prototype expands to its full height. This happens even if the aspect ratio is locked.

I’ve tried closing and reopening the files, but the bug persists