This probably wouldn't usually be an issue, but if the block above is the ceiling of a compact machine, the mesh ends up outside the compact machine, which is unreachable space. Maybe there's some kind of offset for where the mesh item entity spawns? The sieve item entity itself never seems to get pushed up.

Came across while playing version "Client 1.0.2.1" of https://www.curseforge.com/minecraft/modpacks/compact-claustrophobia .

• ExNihiloCreatio version: 0.4.7.2
• (if relevant) Compact Machines version: 3.0.18-b278

For the record (in case this benefits any future player who stumbles their way into this issue), you can shift right-click the sieve with an empty hand to remove the mesh (safely).