Error Message when searching users (user exists)

[astapc]

Tested with 2025.4

Steps to reproduce:
Open Menu "User&Roles -> Users"

Type for example "a" - Error appears:

After closing error Message, Message appears with every new character typed in.
But clicking into input field, a matching user can be selected:

Additional information: "User&Roles -> Roles" search works.

[lukmzig]

User listing was fixed on BE: pimcore/studio-backend-bundle#1859

However, the search seems to send wrong queries:

When typing a it sends empty query, typing ad sends query with only a character etc ... So basically it always sends previously typed string as query, not current one which can lead to confusing results.
Please have a look on the FE side.