I had two crashes.
The first crash happend when the creeper blew up by himself. The second was i think because it was killed either by falling or getting shot by a skeleton.

first crash

second crash

thank you, sorry, did not see that other issue

seems like #8
java.lang.ClassCastException: class java.lang.Float cannot be cast to class java.lang.Double (java.lang.Float and java.lang.Double are in module java.base of loader 'bootstrap') at net.minecraft.class_1309.handler$icj000$relicex_dropLoot(class_1309.java:41570)
and tested it out now and should be fixed with the latest version

Hi there,
This issue should now be resolved as of release 3.1.2 and 3.2.2.
Thanks.