Bug description

The mod will slowly over time start leaking memory if i keep close to any grave on a locally hosted server.
At first i ran out of memory on my PC in a manner of hours and it wasn't noticeable. Now it's down to a minute or two after playing more on the sever. Only mitigation is breaking the graves ASAP or staying away from them.

It might be related to me not breaking my own graves surrounding my base for a while. After breaking them or staying away it can be contained, but if i stay close to any grave i run out of system memory in less than 2 minutes (the system got 64GB).

So far it's only me on the small server affected by this, but i also have the most playtime on the server.
The mod is installed with the rlcraft dregora modpack.

Minecraft version

1.12.2

Mod version

1.10.3

Mod loader and version

forge-1.12.2-14.23.5.2860

Steps to reproduce

1. die a lot in one area and don't clear up the graves
2. keep close to the graves while playing for a couple of days

Expected behavior

No response

Log files

https://gist.github.com/Jonnll/2d5455ade85b80d40b0b20d950c377f9

Screenshots

No response

Here is the first crash log, might be more useful than the recent one.
https://gist.github.com/Jonnll/3035ec9c2c0d9bcd6fb6c1df4725acf8

You are using an unsupported and outdated Minecraft version. See https://github.com/henkelmax/gravestone/branches/all on which versions are actively maintained.