I checked and tested this, for "my friend" it was caused by a mod called
always show passive item and actives icon
you can check if its bugged by going to the spiritual overflow item in the store, if your in the bugged client lets call it, spiritual overflow will show +20% duration instead of +20% ability cooldown (in this client buying mystic shot will 100% crash you)
disable this mod and try buying again or if you don't know how to do that verify file integrity and it should fix your problem
I believe the issue is with some kinda file inconsistency on your pc with the games servers and that's why spiritual overflow shows up incorrectly in the shop
ironically enough
this also BRICKS the item's new cooldown passive and makes the new updates passive part of the item nonfunctional
I am not accusing any one here of using mods or saying mods are against tos or anything, but if you are having this issue just check that one thing please as
your essentially changing the game play files and its changing your client because of the most recent patch's interactions
I doubt this was the mod authors intention, but the mod itself will probable need to be updated to suit the patch, this probable isn't a valve issue
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