The MultiExcerpt Macro is a static Atlassian Connect macro.
In the new/fabric page editor if you nest a macro (e.g. the info panel macro) in a static Connect macro (e.g. MultiExcerpt) then the browser developer console Network tab shows an endless stream of requests to Confluence.
This is a bug in Confluence, being addressed by Atlassian with CONFCLOUD-70795.
Please add your vote or comments to Atlassian’s bug.