What is the current behavior? Describe the bug
If user paste inline noneditable element then type 1 symbol after it then press backspacke, symbol won't be delete and caret will be before it.

Please provide the steps to reproduce and if possible a minimal demo of the problem via fiddle.tinymce.com or similar.
http://fiddle.tinymce.com/cjhaab
What is the expected behavior?
Symbol can be removed

Which versions of TinyMCE, and which browser / OS are affected by this issue? Did this work in previous versions of TinyMCE?
5.*+ Latest chrome

P.S.
I debugged it.
Before that line execution https://github.com/tinymce/tinymce/blob/master/modules/tinymce/src/core/main/ts/delete/CefBoundaryDelete.ts#L27
HTML is <p>Hello <span class="noneditable">world</span>"65279;1"</p>
and current range is correct, but after execution that line caret moves to self block and HTML is
<p>Hello <span class="noneditable">world</span>"65279;""1"</p> and range is broken, then https://github.com/tinymce/tinymce/blob/master/modules/tinymce/src/core/main/ts/delete/CefBoundaryDelete.ts#L34 that line will restore range to delete incorrectly.