Cannot change particles.png with resource pack in an Education Edition world

When creating a resource pack, I could not successfully retexture particles.png. All the folders were correct, and I could retexture other textures correctly in that same folder, (I tried shriek.png) but a custom texture for particles.png would not display in game. The file was named correctly, at least named so that my computer did the whole "there is already a file named particles.png in this location" when I put the particles.png file from the Bedrock sample resource pack, so either that one is named incorrectly or there is just something wrong with that file.

Screenshot of the file + location and all

Steps to reproduce: Create a resource pack, and retexture particles.png. Apply this pack and observe some particles

Expected behavior: The new particle texture would be displayed in-game.

Observed behavior: Particles still had their default textures.

Notes: I am incredibly confident the format was correct, or at least the exact same as the official bedrock sample resource pack. I could retexture everything else with no problem, and could even change the .json files for particles to a new texture and that worked. All the .json files (in the bedrock sample resource pack anyway) were pointing to textures/particle/particles, and that was the exact name of the file in my resource pack; it just did not work. Also, I saw a bug report on here somewhere earlier that was something along the lines of "this resource pack i found with custom particle textures doesn't work!" but it had been closed due to the author not providing much description of anything and then not responding.