Peer IDs don't show for some users

[hackergrrl]

When I hit Alt+L in the public cabal, the user with the key 9e5ec550cb9c2575cc5aeb61204c3587582efd357db2d3bef85d09026e58e8c1 didn't have a key substring appear beside their name.

[cblgh]

posting for context

10:26:26 <@cblgh> yeah that's been a bug since we launched the moderation
10:26:38 <@cblgh> haven't pinpointed it, mostly cause i had a hard time doing repro
10:27:05 <@cblgh> might be a key collision, and the key expanding algo is returning nothing instead of a slightly longer key suffix