Summary

When editing a page and attempting to insert a macro, the macro modal window takes more than 20 seconds to appear.
If the editor is kept open, the macro modal window will be displayed as usual once it has been opened once.
If the editor is closed and re-opened, the same behaviour happens (+20 seconds to display).

Steps to Reproduce

1. Edit a page.
2. Use the insert Other macros

Expected Results

The macro modal window is displayed properly and fast.

Actual Results

The macro modal window takes at least 20 seconds to display, sometimes not displaying at all.

Workaround

None.