Simple refresh in Confluence editor breaks Connect iframes ("ac/context missing ac/content-resolver")

[marc]

@dmorrow @sven.schatter
Possibly related issue: Getting ReferenceError AP is not defined - #23 by BobBergman
This is tracked at [CONFCLOUD-69391] Using Connect Apps in the new editor sometimes causes: ReferenceError: _AP is not defined - Create and track feature requests for Atlassian products.