Spelunkery for fabric appears to break with Moonlight 2.16.18+
One known issue is that gem ores do not correctly drop rough gems, but there could be additional issues.
Unfortunately, it is late so I will not git bisect moonlight to find the exact breaking change, but hopefully this will be a useful starting point. I'm also not sure if forge is broken too.
Spelunkery for fabric appears to break with Moonlight 2.16.18+
One known issue is that gem ores do not correctly drop rough gems, but there could be additional issues.
Unfortunately, it is late so I will not git bisect moonlight to find the exact breaking change, but hopefully this will be a useful starting point. I'm also not sure if forge is broken too.