Duskblade Bug [Gameplay]
Duskblade of Drakktharr has a new passive that disables wards stepped on this season. Turns out it also disables traps, specifically teemo shrooms making the purchaser 100% immune to his ult. If disabling traps is intended it should be listed in the tool tip, If it isn't intended it should be reviewed and fixed.
Most likely cause of the bug is the reuse of the ability of the old mechanic for the trap disabling items being reused as a ward disable affecting champion placed traps, Have not confirmed whether this also affects shaco boxes or jhin traps, but they should be looked at aswell.