Bugzilla

Testing in the 80.0b2 release candidate on Ubuntu 18.04.4.

Added the following in a new Test address book:
b, a <ab@example.com>
b, c <cb@example.com>
alessandro@thunderbird.net

Attempted to write an e-mail to a new recipient, a, x <example.com> by typing a, - When the comma is entered, the autocomplete still selects alessandro@thunderbird.net. 
Added an a, x address to my address book and that was autocompleted when typed.

Second, we want to write to b, c <cb@example.com>. So we enter b, and and b, a <ab@example.com> is selected.
Well a does come before c, but I do see b, c in the drop-down choices and it is the first selection if I type b, c.

HTH

Testing in the 80.0b2 release candidate on Ubuntu 18.04.4.

Added the following in a new Test address book:
b, a <ab@example.com>
b, c <cb@example.com>
alessandro@thunderbird.net

Attempted to write an e-mail to a new recipient, a, x <example.com> by typing a, - When the comma is entered, the autocomplete still selects alessandro@thunderbird.net. 
Added an a, x address to my address book and that was autocompleted when typed.

Second, we want to write to b, c <cb@example.com>. So we enter b, and and b, a <ab@example.com> is selected.
Well, 'a' does come before 'c' in the alphabet, but I do see 'b, c' in the drop-down choices and it is the first selection if I type 'b, c'.

HTH