Some items that would normally not trigger sculk sensors when right-clicked in the main hand can generate vibrations when right-clicked in the offhand instead. These items are:

• Shields
• Bows, crossbows, tridents
• Spyglass
• Food

Note that this isn't talking about the item completing it's animation, just about right-clicking it.

Expected behavior
The listed items would not generate vibrations when right-clicked in the off-hand.

How to reproduce

1. Get a one of the listed items and place a sculk sensor.
2. Right-click the item in the main hand, notice how it doesn't trigger the sensor.
3. Swap your item to your offhand.
4. Right-click the item again in the offhand and notice how it does trigger the sensor now.