I have CiviCRM sites (5.12 and 5.13 on Drupal 7 with Aegir 3) where the behaviour of CiviMail initialisation (and the admin status page) depends on particular HTTPS setup: finishes or loops infinitely.

How HTTPS setup influences this behaviour? How to configure HTTPS on Cloudflare to avoid interference with CiviMail?

• When HTTPS managed by Aegir, the mailing initialisation works.
• When HTTPS are managed by Cloudflare and Pound, but not Aegir, mailing initialising never ends. Workaround here to run on plain HTTP, which is hardly acceptable.

The status page for CRM administrators also behave differently, it point to some Angular issues.

(update) Error in console:

Blocked loading mixed active content “http://example.com/sites/example.com/files/civicrm/persist/contribute/dyn/angular-modules.87ce61fa6dc174d5e3e11f666ca386e5.json”[Learn More] a:1:778
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help http://xhr.spec.whatwg.org/ jquery.min.js:4:26272
Using //@ to indicate sourceMappingURL pragmas is deprecated. Use //# instead jquery.min.js:2:21
WARNING: Tried to load angular more than once. jquery.min.js:320:189