Group by Sort collapses on restart

[TahoeFred]

In Thunderbird, when using the "Group By Sort" feature to organize emails by time periods such as Today, Yesterday, Last 14 Days, and Older,  these groups collapse upon restarting the application.

I like to keep today and sometimes yesterday expanded. However i restart my pc numerous times during the day and when i restart Thunderbird the days I left expanded are collapsed once again.

Could not find an add-on or anyother solution to this so hopefully it can get on the list of features to consider.

[Jon]

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