CKE 4 dies when dragged

[brandonkelly]

Description

When the plugin is set to use CKEditor 4, the field will appear to lose its value and become unresponsive when it is dragged, such as within a Matrix block. Thankfully, the source <textarea> element will have already been updated, so no content is actually lost.

Steps to reproduce

1. Set the CKEditor build URL to https://cdn.ckeditor.com/4.16.0/standard/ckeditor.js.
2. Create a CKEditor field within a Matrix field.
3. Create an entry with the Matrix field., and give it a couple blocks.
4. Drag one of the blocks.

Likely also affects Neo and Super Table.

Additional info

• Craft version: 3.6.12
• PHP version: n/a
• Database driver & version: n/a
• Plugins & versions: CKEditor 1.0.0.1

[brandonkelly]

Fixed in CKEditor 1.5.0 (Craft 3) and 2.2.0 (Craft 4).