Emerald Hunt Z coordnate bug

Copied from https://mb.srb2.org/showthread.php?t=46614

For some reason or another, Emerald Hunt will sometimes spawn the emerald shards at the wrong Z coordinates. I can only assume that what's going on is that it somehow doubles what the z coordinate should be.

This bug was first seen in The CyberDime Realm and then Resurfaced again In Dimension Glaber. elvinkonohana has already documented the first case. In the case of Dimension Glaber, I have attached 2 screen shots in the link above. The link below is to elvinkonohana's post.

https://mb.srb2.org/showthread.php?p=815724#post815724

It's also been observed that emerald shards without a z height set can spawn correctly if they also are not under water.