Having a freeform combo w/ boomerang flag behind a block boomerang combo can still be triggered.
The block boomer combo blocks and stops the rang, but it still triggers the ffc right behind it (meaning to the right of it).
set up with the block brang combo to the left of the ffc and throwing the rang from the left side of the screen.
block boomerang combo
Confirmed in b584.
The BlockBoomerang FFC lets the boomerang into itself and stops it only from going over, which means it barely touches the boomerang flagged combo.
I must add, that the boomerang is randomly blocked or not blocked by the FFC when throwing from north or from south. Seems like the bomerang has chance to be stopped only when the whole boomerang touches the FFC, not only a part of it...
I think this is also fixed by my recent 'Block X' changes.