The Bug:
Sculk sensors are not activated upon opening a hopper.
Steps to Reproduce:
Open a minecart with hopper.
→ ✔ The sculk sensor activates.Open a hopper.
→ ❌ The sculk sensor does not activate.
Additional Information:
Quote from the 20w49a Changelog, "A vibration is anything that causes physical motion". I would definitely consider this as physical motion, as you are physically opening up a hopper. If opening a hopper in a minecart produces a vibration, why shouldn't a normal hopper do so as well?
Can confirm.