Regarding the object selection issue of screen space reflection/refraction in Post-processing

In the puzzle, I used the screen space reflection puzzle. If the target of this puzzle is all objects, it should be like Bloom without the option to select materials. However, this is not the case. My common sense is to put two such puzzles inside and choose different materials. The final result is that the effect of the screen space reflection puzzle that is put in later can be applied. The first one can see the effect before saving and refreshing, but after saving and refreshing, the effect of the previous one disappears, leaving only the effect that is put in last. What is this for?
If it is applied to all objects, there should be no need to choose materials, but now the option to choose materials is given, but this effect can only be used on one material. I don’t understand why it is not possible to put multiple puzzles like this and give this effect to other materials separately

• This topic was modified 2 hours, 9 minutes ago by dx556po.