Glowing dragon fireballs no longer show the glowing outline

Steps to reproduce:

• Open a world in 1.21.8

• Summon a glowing dragon fireball with this command:

  summon dragon_fireball ~ ~1 ~ {Glowing:true}

• ✅ Observe that it has a glowing outline.

• Close the game and re-open the world in 1.21.9.

• ❌ Observe that it no longer appears to be glowing. To verify it still has the tag, you can summon new ones with the same command or check its NBT data with this command:

  data get entity @n[type=dragon_fireball] Glowing

Observed Behaviour:

The glow is missing in 1.21.9 (see screenshots).

Expected Behaviour:

The dragon fireball should have a glowing outline, like before and like normal fireballs do.