Category drop down menu not updating on the edit product page
I installed Magento 2 a couple months ago at that point i added a couple products and categories and it was working fine. I haven't done anything since then.Today i added a few new categories and they appear everywhere but on the category drop down menu on the backend edit product page. They show when you click the new category button next to the drop down menu and they appear on the front end. Does anybody know what is causing this issue?