[Paul de Wouters]

ah, what’s the earliest supported version? Answer: 3.6 or higher

[Paul de Wouters]

Referencing ticket: https://buddypress.trac.wordpress.org/ticket/5843

[Paul de Wouters]

Hey Paul,

Thanks, I’ll open a trac ticket

[Paul de Wouters]

Thanks for your reply.
So, did a little research, and Codex says:

The function [get_current_screen] returns null if called from the admin_init hook. It should be OK to use in a later hook.

So BuddyPress could check whether the remove_signups_from_user_query method was called through the admin_init hook and return if so:

		if ( ( doing_action( 'admin_init' )  ) || $this->users_page != get_current_screen()->id ) {
			return;
		}

This fixes the issue for me.