LDAP users limitation on group admin

Nextcloud version : 13.0.5
Operating system and version : Centos 7.4
Apache or nginx version : Apache 2.4.25
PHP version : 7.1

Hi all, I found something a bit… strange. When you got ALL users from LDAP users in your Nextcloud instance, there are some limitations.
If you give “Nextcloud group admin” right for someone on a group, this person won’t be able to list the people and add them to this group. The “all people” list stays empty, only his own profile appears.

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. Clic on user in menu
  2. clic on all people
  3. nothing appears

Is this normal? Thanx