Aliases are not removable one by one

==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): v2.1.1 (LDAP)
- Linux/BSD distribution name and version: Ubuntu
====

Mailuser with Mailbox and Aliases:

Aliases are not removable one by one. Add Aliases one by one is no problem.

If I want to delete some aliases, first I must remove all, save empty textarea and then add aliases again.

Is this the normal way?

Thanks a lot

Greets Arne