We have recently started to migrate our service team from the Classic service console to the Lightning service console. One of the components we are trying to re-configure in the lightning environment is the email composer.

We have identified a number of issues with the console that we were hoping to rectify with a new email composer in lightning.

The issues that we identified were as follows:

1. Email composer is too small.
2. When user selects template they are shown "My templates" initially from the template selector.
3. Default template is not automatically replaced when a user selects a template.

These issues we were able to resolve with our Salesforce Developer who was able to create a new composer within our testing environment.

However, we have now encountered a new issue with the rich text editor within the tool bar to edit the HTML templates; the issue is that despite the template loading correctly we are not able to edit the text within the template using the toolbar. 

Our developer has tried a number of different integrations to try and resolve the issue, but she has not been successful so far.

Can anyone suggest a workaround for being able to edit the HTML template through the rich text editor or another means of creating an email composer?

Thanks,
Sandip