Parchment Error thrown when trying to replace text that has an explicit font set

[clemmy]

When I highlight all the text (via cursor or Control + A), change the font, then press a key in order to replace the text, Quill throws an error, Uncaught ParchmentError: [Parchment] Unable to create [object HTMLFontElement] blot. The stack trace is as follows:

create  @   quill.js:929
(anonymous function)    @   quill.js:568
ContainerBlot.update    @   quill.js:561
FormatBlot.update   @   quill.js:1084
(anonymous function)    @   quill.js:1503
ScrollBlot.update   @   quill.js:1500
update  @   quill.js:5759
(anonymous function)    @   quill.js:1399

Steps for Reproduction

1. Visit beta.quilljs.com
2. Highlight all text
3. Change font to monospace
4. Press any key to replace the text

Expected behavior: The selected text should be replaced with whatever you type.

Actual behavior: An error is thrown.

Platforms: Chrome 52 on Mac 10.10.5

Version: 1.0.6.Beta