The echomail autocreate areas in 8.3 format is very rare. Works fine around some time and suddenly Mystic stop creating them with short names and autocreate them with long names. Very strange.
I can't see any place in the code that would cause this. Do you have a log or an actual example of a name of a base where this happened? Maybe I can try to recreate it here using the same name.
... Computers all wait at the same speed!
--- Mystic BBS v1.12 A49 2023/01/31 (Windows/64)
* Origin: Sector 7 * Mystic WHQ (1:129/215)