Texture addon overrides from multiple packs not working consistently between Realms and local server

It appears that mcpacks that override the texture/environment/destroy_stage_*.png textures do not work correctly on realms when combined with other texture packs.

Steps to reproduce:

I created the attached no_block_particles.mcpack that overrides the texture/environment/destroy_stage_*.png textures and particles/block_destruct.json animation (to make the game enjoyable for people that are disturbed by the default animations).

To see the problem, skip to Test 4.  The other tests are just to show the texture pack works as expected in other situations.

• Test 1: locally-hosted game on Windows 10 with only no_block_particles resource pack:
  • destroy_stage_*.png textures from no_block_particles pack are used as expected.

• Test 2: locally-hosted game on Windows 10 using no_block_particles resource pack in first slot and the "Plastic Texture Pack" from Mojang in slot 2:
  • destroy_stage_*.png textures from no_block_particles pack are used as expected.

• Test 3: Realms-hosted game with only no_block_particles resource pack:
  • destroy_stage_*.png textures from no_block_particles pack are used as expected.

• Test 4: Realms-hosted game using no_block_particles resource pack in first slot and the "Plastic Texture Pack" from Mojang in slot 2:
  • destroy_stage_*.png textures from the "Plastic Texture Pack" are used instead of the ones from no_block_particles pack in the first slot.
  • Note that the no_block_particles particles/block_destruct.json animation still takes effect so the pack is being loaded.
  • Expected behavior: textures from the no_block_particles pack in the first slot should be used instead. (consistent behavior with Test 2)