Synthesis mod "You and nearby allies deal x% increased damage" not working

The synthesis mod "You and nearby allies deal x% increased damage" doesn't do anything (tested with a bow and a 1h axe).

Did various tests with items that have similar wording: Leer Cast, Dying Breath
These work properly.

Testing consisted of partying another player and doing the following tests:
-unequip/equip weapon to see if damage changed
-move in/out to see if damage changed

This mod was working previously in 3.21