Holding a spear prevents attack interactions with interaction entities

Normally, left-clicking an Interaction entity saves the attacker on its NBT data, allowing commands to detect the left click.

However, they seem to ignore their attackers when any weapon with minecraft:piercing_weapon component such as spears hits them.

How to replicate:

1. /summon interaction

2. Get a spear

3. Attack it with the spear

4. /data get entity @n[type=interaction]

You will notice that the “attack” NBT field is completely empty. If you repeat this with any other item, that field gets filled up like normal.