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.
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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