BuddyPress.org

hi @mlao,

we let the tab All members where it is and remove only the count.

function mlao_gettext( $translated, $original_text, $domain ) {

    if ( 'buddypress' !== $domain )  
           return $translated;

    switch ( $original_text ) {
        case 'All Members %s':
            return 'All Members';

        default:
            return $translated;
    }
}
add_filter( 'gettext', 'mlao_gettext', 20, 3 );

Add this to bp-custom.php or child-theme functions.php

No idea ! The snippet doesn’t change any URL, it only remove the count part of the original text.
Check your theme or any custom function using a redirection. Sorry, can’t help you for this issue.