Question:

CKEditor does not display when editing event

Wyatt: 5 days ago

I just upgraded to civicrm 5.12.0 and the ckeditor is not available when editing an event. It is there when entering a new event. I think we had this problem with the previous version as well.

Answer:
Thomas: 5 days ago

My solution to my own earlier question: WYSIWYG editor not present with WordPress (https://civicrm.stackexchange.com/questions/20888/wysiwyg-editor-not-present-with-wordpress) may provide an answer. If this was the cause of your previous problem it would have reverted on an upgrade.

Is CKEditor missing in all circumstances (eg sending an email)?