bbPress.org

I haven’t got much else to add except I think you have tried everything to find ‘spot the difference’ 😉

I am glad it is sorted though.

If you have SSH access to your host go on a code hunt 😉

grep -i -r 'bbp_list_forums' * and/or grep -i -r 'bbp-forums-list' *

This will find any reference to the term ‘bbp_list_forums’, there might be some rogue hiding spot where this is being used as a custom function somewhere.