User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Safari/605.1.15

Steps to reproduce:

try to sort by correspondents

Actual results:

it crashed, on iMac spinning ball and 'not responding'

Expected results:

it should sort

wfm on Win10, 78.1.0 (64-bit), but reported against Mac.

• Eugen, can you share Crash report from Help > Troubleshooting information > Crash Reports for the Last 3 Days?
• anything in error console?
• does this happen in TB safe mode (restart with addons disabled)?

"Mac spinning ball and 'not responding'" is a hang, not a crash ;)
(In the Mac world, hangs are routinely referred to as crashes for some odd reason)

started in TB safe mode, the same thing. There is no crash report from the last 3 days; all very much older.
So when I try to sort my email by 'correspondents' I get a spinning Apple ball. Can't do anything until I force quit application and restart. At moment I am not using this way of sorting to avoid the problems. TB 78.1.0 on iMac 10.15.6

Eugen, pls do this:

1. In "Local Folders" account (bottom of folder list), create a folder named "Test".
2. copy 3 messages with different correspondents into "Test" folder (or, for perfect testing, create new messages with simple recipient names like John Doe, Jane Doe, and Tim Test, and copy them over from draft folder).
3. Show correspondents column if not shown yet, then try to sort as you did in the fail case.
4. Report success or fail here.

Btw, any special characters in your correspondents, accented, unicode emojis or the like?

(In reply to Wayne Mery (:wsmwk) from comment #2)

"Mac spinning ball and 'not responding'" is a hang, not a crash ;)
(In the Mac world, hangs are routinely referred to as crashes for some odd reason)

Mac crashes must go hang! ;-)

We'll cover this in bug 1657565