This is potentially a strange one to recreate.
I have noticed it in a few different instances, but have managed to recreate it consistently by following these steps:
This is an already created Grid + Cell layout
- Select the grid
- Go to the customise tab and scroll down a bit (this grid has Looper provider query and options)
- In the preview pane, select a cell
This will then show an entirely empty inspector tab.
This was occuring in b7 as well, but I can’t remember the specifics of the situation.
Hope this is enough to identify the bug!