Assegnate 4 su 5 stelle

I have a similar problem to 'JayUSA on Oct. 1, 2019'.
I'm using Thunderbird v68.2.1 32bit on Windows 10 Home 64bit DELL PC.
I also have Manually Sort Folders add-on.

WhenThunderbird starts up, it displays the last folder used in the previous
session...
[not Local Inbox .... Manually Sort Folders add-on not
working properly now either]
...with Headings for 'Sender[@]' & 'Recepient[@]' but for each email there is no
information displayed under these headings [Subject, Date, Account,etc are
all correct].
If I select another folder, all information is correct.
When I then select the original foler again, all information is now present.
In other words the 'Sender[@]' & 'Recepient[@]' information for each email
is now present.

I value this add-on as it has saved me from a number of bogus & scam emails
in the past.

Many thanks

P.S. I can supply a screen print if you wish.