Particles are created when punching nether portal blocks

The Bug

This doesn't make sense - how are you supposed to be able to dislodge fragments of distorted spacetime? Also inconsistent behaviour with other portal-type blocks - end portals and end gateways.

Steps to Reproduce

• Switch into creative mode and obtain a sword.
• Summon a nether portal block nearby.

  /setblock ~ ~ ~3 minecraft:nether_portal
  

• Whilst holding the sword in your hand, begin hitting the nether portal block.
• As you do this, take note as to whether or not nether portal blocks produce particles when being hit.

Observed Behavior

Nether portal blocks produce particles when being hit.

Expected Behavior

Nether portal blocks would not produce particles when being hit.