wp-multisite/bp-multinetwork plugin queries nonexisting usermata-tables

Hi,

have a WP multisite installation with
‘BP multi network’ plugin network-activated
and Buddypress as a site by site activation.

Having activated your plugin on a subsite (subdirectory) and going to the ‘members’ or ‘activity’ page, I get this database error message:

SELECT user_id FROM wp_3_usermeta WHERE meta_key = ‘_bprwg_is_moderated’ AND meta_value = ‘true’ :
Table ‘mydbase.wp_3_usermeta’ doesn’t exist (where ‘mydbase‘ is a placeholder for the name of my database).

So somehow it seems to query user(meta) tables for subsites which of course don’t exist.

Any ideas, what might be wrong? – Is this a misconfiguration of my setup or is ‘bp registration options’ basically not compatible with an ‘BP multi network’ setup?

Thank you for advice
Achim