The Bug:
Sculk sensors are not activated upon using a spawn egg.
Steps to Reproduce:
Spawn any mob using a spawn egg.
→ ❌ Notice how the sculk sensor does not activate upon doing this.
Additional Information:
Quote from the 20w49a Changelog, "A vibration is anything that causes physical motion". I would definitely consider this as physical motion, as a mob is being summoned. Closely relates to MC-210279 and since this is a confirmed issue, it would only make sense for this to follow the same pattern.
Can confirm