Table of Contents Plus plugin brings some bugs when used with Gutenberg

Hi,

please check: https://github.com/WordPress/gutenberg/issues/10523

Describe the bug
The Table of Contents Plus plugin brings some bugs when used with Gutenberg. I have only activated the following plugins: Table of Contents Plus and Gutenberg. Nothing else.

Some Layout Bugs: https://prntscr.com/l4xipc
The shortcode cannot be inserted. The article cannot be saved: https://prntscr.com/l4xk9b

To Reproduce
Steps to reproduce the behavior:

Go to ‘pages’
Click on ‘edit’ and insert the shortcode from Table of content plus
See error
Expected behavior
That the article is saved and that no display errors occur.

Screenshots
https://recordit.co/f6NRQEohhT

Desktop (please complete the following information):

Win 10
Chrome
Version 69
Additional context

Please add the version of Gutenberg you are using in the description: 3.9

The page I need help with: [log in to see the link]