fatJesus 

Ambient effects and Ambient unlocks

Many items don't have ambient effects and the infused items with ambient unlcoks don't work. Like PA's fearful aria shoulders, ursa's claws of the ferocious heart, etc.
Even troll warlord's bitter lineage immortal doesn't have ambient effects or mk's arcana.
I bring this up as I used to use an older version of dota2mods (3.9 I think) before this batttlepass and back then all of those itmes wroked just fine.