I would like to do something, after a topic was approved by using the WP filter "wpforo_edit_topic_data_filter". Would be great to know, what was changed inside that filter. To know this it would be easier, if the old values would be transmitted to the filter too. Can you add "$topic" to "apply_filters" as a third argument?

If yes, maybe also "$post" to the "wpforo_edit_post_data_filter" filter?

This should not bother existing handlings of that filter and should not force an additional DB request. So no disadvantages by this changes.