Originally posted by Adalon:

Problem solved. The reason was that the "Torn spirits" (x3) fell UNDER the textures of the altar. I noticed a small spark rising from inside the altar, picked up a pickaxe and began to dig under the altar. At some point, the loot fell fell from above.

Yes.
We had this 2 times.

This is exactly what happened to you.

Fortunately for you, your altar wasn't near sea level like ours. No chance of getting that out. The problem is well known and has been addressed several times way before Mistlands, but apparently they are more busy fixing things that aren't broken.

But what am I talking about, no one is interested anyway.