[rapidasia]

define( ‘BP_ENABLE_MULTIBLOG’, true ); in wp-config.php this enables buddypress stuff on the subsite

by default it is false

[rapidasia]

if you’d like to be confused even further, take a look at

BuddyPress Cover Images

it seems to say that the BP Theme Compat API uses the filter bp_before_members_cover_image_settings_parse_args for the members Cover Images

or…

something on your site is using that to call the member cover image…

I’m just guessing and floundering.

[rapidasia]

code snippet or in bp-custom.php located in wp-contents/plugins/ folder ?