TinyMce editor does not load when using Imagevault

Description

Step to reproduce

1. Place 2 tinyMCE editors on a page (Example MainBody & SecondaryBody).
2. Activate/Enable ImageVault buttons on MainBody property (in toolbar) through Admin mode.
3. SecondaryBody should not have ImageVault buttons added to toolbar.
4. In On-Page editing mode, try to edit the secondary body first.
5. Edit the MainBody.

Expected: No error thrown, and editor loads fine.
Actual: Main body editor doesn't load and throws errors:
Failed to load: http://cms75mvc/EPiServer/CMS/9.9.2.0/ClientResources/Editor/tiny_mce/plugins/imagevault/editor_plugin_src.js
widgets.js:2 Uncaught TypeError: Cannot read property 'getContent' of undefined