Bug In Thunderbird Lightning Calendar

[viveksuraiya]

Mozilla Thunderbird Version: 78.11.0 (64-bit) (Windows 10)
Provider For Google Calendar Add-On Version: 78.0.1

Steps To Recreate The Problem:
Create an event in your Google Account Calendar and invite an attendee. Save and close the event.
Firstly, after inviting an attendee, the 'Save and Close' button does not become 'Send and Close', as it used to before.
Secondly, if you reopen the event, the attendees are not saved. The attendee section is blank.

Kindly fix the problem. I think the problem might be with Provider For Google Calendar since attendees are saved when I create a 'local' (non-Google calendar) event.