Bugzilla

There is a report of this problem in Support forum occuring in both Windows and MAC OS.
Reporters state this issue occurred in 91.0 after update to include star. They like the star, but issues with not detecting where the new mail is stored is a problem. In business terms it wastes a lot of time trying to locate the new mail.

The report is not just one person - there are 5 different people all experiencing this problem.

https://support.mozilla.org/en-US/questions/1354673

Basic issue:
IF top level folder is expanded so all subfolders are visible then subfolders receiving new filtered unread mail will display blue, bold and star plus (n) number of unread email. No problem.

IF top level folder is collapsed so subfolders are not visible, then when top level folder expanded -the subfolders do not display blue, bold, star if they have received the new unread mail. 
This is a problem because no one knows which subfolder received the new mail.


Emails get filtered to subfolders.
IF Top level folder with subfolders in collapsed state
receives new mail which is filtered to a subfolder.
top level folder is blue, bold and star to say new unread mail since last opening  - also (n) stating number of unread messages
Expand top level folder to see which subfolder has new unread message.
top level folder now not bold nor blue.
Subfolders display the (n) indicting unread mail, but not showing as blue and no star.

IF Top level folder with subfolders in expanded state - so all subfolders visible
receives new mail which is filtered to a subfolder.
top level folder not bold nor blue.
subfolder indicates blue, bold and star and (n)


In some cases where there is sub folders in subfolders - it effects the lowest subfolder.
Top level indicates new unread - blue, bold, star (n) - collapsed state
Expand and top level returns to normal state - not blue nor bold
Sub folder  indicates new unread - blue, bold, star (n) - collapsed state
Expand sub folder to see sub-subfolders and returns to normal state - not blue nor bold
Sub- subfolders now visible but they are only bold with (n)
One has sub sub folders - it is bold (not blue and no star) - it is in collapsed state
select the sub sub folder to expand - it gets highlighted with a star, but it is not blue

There is a video link provided by person in support forum: https://youtu.be/1-V18dvN4lc

There is a report of this problem in Support forum occuring in both Windows and MAC OS.
Reporters state this issue occurred in 91.0 after update to include star. They like the star, but issues with not detecting where the new mail is stored is a problem. In business terms it wastes a lot of time trying to locate the new mail.

The report is not just one person - there are 5 different people all experiencing this problem.

https://support.mozilla.org/en-US/questions/1354673

Basic issue:
IF top level folder is expanded so all subfolders are visible then subfolders receiving new filtered unread mail will display blue, bold and star plus (n) number of unread email. No problem.

IF top level folder is collapsed so subfolders are not visible, then when top level folder expanded -the subfolders do not display blue, bold, star if they have received the new unread mail. 
This is a problem because no one knows which subfolder received the new mail.


Emails get filtered to subfolders.
IF Top level folder with subfolders in collapsed state
receives new mail which is filtered to a subfolder.
top level folder is blue, bold and star to say new unread mail since last opening  - also (n) stating number of unread messages
Expand top level folder to see which subfolder has new unread message.
top level folder now not bold nor blue.
Subfolders display the (n) indicting unread mail, but not showing as blue and no star.

IF Top level folder with subfolders in expanded state - so all subfolders visible
receives new mail which is filtered to a subfolder.
top level folder not bold nor blue.
subfolder indicates blue, bold and star and (n)


In some cases where there is sub folders in subfolders - it effects the lowest subfolder.
Top level indicates new unread - blue, bold, star (n) - collapsed state
Expand and top level returns to normal state - not blue nor bold
Sub folder  indicates new unread - blue, bold, star (n) - collapsed state
Expand sub folder to see sub-subfolders and returns to normal state - not blue nor bold
Sub- subfolders now visible but they are only bold with (n)
One has sub sub folders - it is bold (not blue and no star) - it is in collapsed state
select the sub sub folder to expand - it gets highlighted with a star, but it is not blue

sometimes you only discover which folder has the new mail after selecting sub  folder in collapsed state - then it may turn blue with star or just get the star.

There is a video link provided by person in support forum: https://youtu.be/1-V18dvN4lc