Group Member List ist broken on Ajax pagination

[f.staude]

The ajax retrieval when browsing through the member list of a group is broken.
We have the probem on our live page, which has a public group e. g. 23 members. On the first page of the group members list the members 1-20 are shown and the page number indicates that there is a second page. When I click on the second page, the list is loaded via Ajax and suddenly all members are displayed to me, not just those who are members of the group. If I use the link ​http://site.tld/groups/groupname/members/?mlpage=2 the list is correct. Only with the Ajax retrieval the result is wrong.

Here is a group where you can see this behaviour

​https://dev-groups.rpi-virtuell.de/groups/die-sprachwaschmaschine/members/

First page says,"Viewing 1 - 20 of 23 members."
after clicking on page 2 all members of the "Show 21 - 40 of 720 active members"system will be listed.
The non-Ajax version of ​https://dev-groups.rpi-virtuell.de/groups/die-sprachwaschmaschine/members/?mlpage=2 is correct.

To exclude that it is due to other plugins or the theme, I installed a new WordPress instance locally and installed only BuddyPress.
I have created 30 users and assigned 23 to my group.
Also there, the result of the Ajax flip function is incorrect. However, it says on the second page "Sorry, no members were found."

[antonioeatgoat]

Duplicate of #7704

[DJPaul]

Sorry for the damage, @f.staude! We'll try to fix as soon as we can. Keep an eye on #7704 for progress, as @antonioeatgoat says.