Hi,
if I understood what you report correctly this is not a bug.
The software always try to show only those elements that are visible. So if when you access to the pano that part was hidden by a polygon that then you removed, then you need to :
- reloading the pano ⇧ + ⌘ + space in mac ⇧ + ctrl + space in windows, or just by menu view -> reload pano
on the other side if you would like to force viewing everything you can
view->all model geometry.
Then you should be able to see those elements.
Kind regards