I have created a new Jira Dashboard, and I am adding Gadgets. However, for some Gadgets, when I edit the properties and click "Save", nothing happens. For example:

The filter (blurred out) works fine for other gadgets. When I reload the page, the gadget appears as an empty box. I have tried different sets of Statuses, but always with the same results.
Sometimes I do get an error message, that explains why "Save" doesn't work, but it is nonsensical:
