Accumulator on weapon damage UI

Anybody knows how to dissimulate the bug that causes the caster’s weapon to modify the UI weapon damage (when the caster is damaged) value when the accumulator is strictly oriented to “Target” location? I tried using an Attack Modifier behavior with a dummy damage effect linked to the vital accumulator I use, but it doesn’t link properly and deals incoherent damage. I haven’t found any other work around to outpass this broken feature…