Steps to reproduce the issue

Setup CSP header to prevent usage of eval functions in script-src.
Connect to Joomla Admin Panel /administrator

Expected result

No console errors.

Actual result

Content Security Policy: The page’s settings blocked the loading of a resource at eval (“script-src”). at jupdatecheck.js:52:11

System information (as much as possible)

Not related.

Additional comments

You can still update Joomla, it just does not notify the administrators on logins.