Hi @200megaton
We don’t have any functionality that would affect the theme/template display, so we don’t have a “rebuild” function.
My biggest question would be if both permalinks are using the same archive template file, and if yes, if there’s any logic in the file that dictates different behavior for the sidebar. Not something I can answer myself, without getting file content feedback from you.
Sorry, I am an idiot. I create the custom sidebar widget area with the WooSidebars plugin and forgot. I’ve got it fixed now. Sorry to waste your time.
No worries, glad you got this figured out 🙂