Glowing no longer works on experience orbs

Closely relates to MC-307625.

If you summon an experience orb with glowing enabled, an outline will not be displayed around it, which is incorrect. It previously used to work (MC-119078), but no longer does.

Command to reproduce: /summon minecraft:experience_orb ~ ~10 ~ {Glowing:1b}

Expected result: an experience orb with a prominent white outline.

Actual result: an experience orb with no outline at all.