causing a suspicious sand to fall on top of 2 webs, after a while it will drop the suspicious sand

What I expected to happen was

causing a suspicious sand to fall on top of 2 webs, after a while it will drop the suspicious sand

What actually happened was...

Steps to Reproduced
1. causing a suspicious sand to fall on top of 2 webs, after a while it will drop the suspicious sand
2. ...
3. ...