Shaders not implemented in game

Minecraft bedrock

Versions 1.17.2

 

When im trying a shaders, it always shows nothing on the screen. I can walk , fly , and break block like normal. This bug applied to the shaders i downloaded after 1.17, the shaders that i have before 1.17 works normally but idk why it doesnt work in 1.17

 

Does this means bedrock 1.17 is still not stable? 

 

I will screenshot it, it might take a moment