overgrowth mtx bug

hello,

i got 2 times stygin and and 2 times bestial overgerowth mtx.

i use 2 overgrowth support gems and if i want to active for example 2 times stygian overgrowth or even 1 time it actives the bestial mtx. i also deleted my support gems and tryed new ones already. there is some kind of bug, i cant activate 2 times stygian effect or even 1 time atm.

If i click on stygian it either uses no mtx or activates the red bestial one.

regards