We are using Jira Datacenter 9.12.8 and Confluence Datacenter 8.5.12.
We use a number of Jira Gadgets in our confluence to add reports to pages. The native Atlassian supplied ones seem to be working ok. But after a recent upgrade the ones by Stonikbyte and Big Picture are no longer available in the macro menu (they have been in the past), if you cut and paste one that has already been added to a page, to another page that seems to work. You just cannot seem to add new to a page. The in built sprint velocity gadget does not seem to work either, even though that is built in Atlassian.
The rest api urls / feed url that we are using are the same ones we used before and rate limiting is not an issue.