I can do but it seems more likely to be an issue with Toolset, since the editor is only experiencing this issue on one specific custom post type, created by Toolset.
The activation of the Font Awesome plugin doesn't affect any regular post types, or even all of the other custom post types created by Toolset.
That is really strange that you do not see the issue with other post types created using Toolset and hard to check what's going wrong with your setup.
Could you please try to resolve your issue by deactivating all third-party plugins as well as the default theme to check for any possible conflicts with any of the plugins or themes?
- Do you see any difference? if no:
I will reuqire problem URL and admin access details.
*** Please make a FULL BACKUP of your database and website.***
I would also eventually need to request temporary access (WP-Admin) to your site. Preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
I have set the next reply to private which means only you and I have access to it.