OK, so just looking at users whose usernames start with c as an example:
- in Town Square, type
@and then scroll down- under C, I see all 18 users whose usernames start with c
- in Town Square, type
@c- under C, I now only see 4 users
- in the search box, type
from:- under C, I see all 18 users
- in the search box, type
from:c- under C, I see only 4 (the same 4 as above)
- in the search box, type
in:town-square from:- under C, I see all 18 users
- in the search box, type
in:town-square from:c- under C, I see only 4 (the same 4 as above)
The filtering by letter always seems to cut out the same users regardless of the channel in which I do it (or indeed the dialog used to create new Direct Messages, as mentioned). I think something is going wrong in that filtering.