"From" user name missing quotations marks in the Header when "Email All Attendees" selected in Fantastical

Hi team -

When I right-click on a meeting in Fantastical and use the "Email All Attendees" feature, MailMate gets focus and a new, pre-addressed message composition window is created as expected, but the "From" header sent by MailMate looks like this (sample data used but you get the idea):

From: Smith, John <john@somedomain.com>

When I create a message within MailMate, the header is:

From: "Smith, John" <john@somedomain.com>

The missing quotes around the name cause messages to appear as sent by an unrecognized sender to the recipients, and a random user picture from another recipient (or no picture) is presented to them in their clients - these include Outlook, MailMate, Apple Mail, and others. Is there a way to include quotes around the user's name when accepting handoffs to MailMate via Fantastical's "Email All Attendees" feature? (Other source apps might have the same issue, I haven't tested.) Maybe a secret "defaults write" command if not a new version update? Version info:

MailMate Version 1.14 (5757)
Fantastical Version 3.3.6 (1266.432.d2bc8b2572.MAS) - Fantastical 2 features unlocked
MacOS 11.2.3 Bug Sur

I have tested the following email clients by setting each of them as the default email app in turn and triggering new "Email All Recipients" commands from Fantastical, and they all put double quotes in as expected:

• Airmail, Version 5.0.1 (660)
• Outlook for Mac, Version 16.47 (21031401)
• Thunderbird,Version 78.8.1
• Apple Mail, Version 14.0 (3654.60.0.2.21)

(Interesting side note, all of the clients except for MailMate and Thunderbird put double-quotes around the "To" user name as well.)

Thanks for any help!