CKEditor textarea field breaking in Repeater field

[benjaminE]

I have a repeater field which contains a textarea field powered by the CKEditor. It works fine under normal circumstances.

However, if I change the order of any of the repeater blocks, any text that has been entered into the text area disappears and the text editing area of the CKEditor becomes unresponsive. If I click on one of the buttons of the editor, it works but I get a JS error gets logged in the console which reads:

Uncaught TypeError: Cannot read property 'getSelection' of undefined    ckeditor.js:386

This is happening in the latest versions of Chrome, Safari, and Firefox and I'm running PW version 2.5.3

Any thoughts on how to resolve this would be super helpful!

Many thanks,

ben