Can't move cursor behind non-editable element in CKEditor

[Jakub Ś]

To reproduce:

1. Open replacebycode sample and clear editor contents.
2. Paste in the following code:

   <p><span contenteditable="false" unselectable="on">[[UMR]]</span></p>
   

3. Put the cursor behind [[UMR]]^ and try to type

Results:

FF - you can't because you are still inside span. You have to press E.g. 'End' key to get out of span.
As described in ​https://dev.ckeditor.com/ticket/7796#comment:4 this is browser issue and I doubt it can be fixed.

IE8 - You can't move cursor behind [[UMR]]^. The issue has been reproducible from CKEditor 3.3.

Opera - the line with [[UMR]] is not accessible. This issue has also been reproducible from CKEditor 3.3 but you can also reproduce it in plain browser without any CKEditor logic (Perhaps earlier releases had something that helped to omit the problem).

Chrome - Works but you can't see the cursor after you click behind [[UMR]]^ (From CKEditor 3.0).

Currently the only way to workaround the issue is to use code like:

<p>
	<span contenteditable="false" unselectable="on">[[UMR]]</span><span>&nbsp;</span></p>