1. After update 65, shadow star can no longer set to marco inventory. Not a bug, see #2 2.Patch note says shadow star has 1 second cool down, but actually the cool down triggered too slow then you can still waste once(200 stars) if you spam it or accidently press the key twice(Edit: considered a bug).
Sadly we can't set skills with cooldowns onto macros. So yes, we can't put Shadow Stars onto a macro as a result. Before this change, we were able to hold down Shadow Stars and burn through all your sets of stars in like 10 seconds. I assume this 1-second cooldown was added to prevent this (especially since recharge costs were significantly increased). Though a 1-second cooldown won't really stop you from accidentally tapping the key twice, at least we won't be able to hold down the skill for longer and waste more than 200 stars. tl;dr shadow stars has a cd now. we can't put skills with cds onto macros.
Thanks a lot, understand if it is a mechanism that we can't put skills with cds onto macros, but I think that means point 2 considered a bug but not a feature(RIP magic throwing knife still cost me 80k even if just once).