Player head textures still won't load - purpur 1.21.10

hello, for some reason SOME heads are still not loading, even after the recent fixes:

Example of an item NOT loading:

headexample1:
  Id: player_head
  Options:
    SkinTexture: eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZWFlODg4OTI3MDM3Zjg3YTU1Mzk1NDFhODljYzVmYTdkOWM0M2M4ZGM1NjMyNjk4YmFkNjRiNzAyNDRkZCJ9fX0

and here is another one that is loading correctly for some reason:

headexample2:
  Id: player_head
  Options:
    SkinTexture: eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYmU1YzQ1NTY5NGI5MjIyNTZjOWU0ZWY2ZTAyYWQ1ZGQ5OTM0NmQzNzM5NWYwYTY4MTNmZTc2MTIzNTdkNjQifX19

MythicMobsPremium-5.11.0-SNAPSHOT 5576 MythicCrucible-2.2.0-SNAPSHOT 4507