Zombified Piglins seem to be unable to call in reinforcements

On hard difficulty, zombies and their variants are able to call in reinforcements when hit. For zombies, zombie villagers, husks and drowned this works without a problem, but zombified piglins seem to be unable to call in reinforcements at all.

If you put in a few zombies in a small room with spawnable blocks with 0 light level near them, occasionally additional reinforcements will spawn in which are normal zombies. If you repeat that for zombie villagers, it’ll also work. For husks, it also works, but only directly under the sky and for drowned, they only can spawn in water. If you attempt the same process with zombified piglins, you may notice that they don’t spawn in reinforcements.