Exp Exploit?

[GetGoodGMR]

So, I'm on a server who has your gravestones on its server, I had 30 experience levels on me when I died... and when I broke the gravestone to retrieve my stuff I got 40 levels in return... I proceed to intentionally die 3 more times to see if it's consistent, and it was, but after the 5th time doing it I started losing levels.

I was wondering if there's something wrong with the Gravestones, because it was giving me levels, but isn't anymore...

[Tri-Iris]

I also experienced it. I died with 18 levels, and got back 46. I think it has to be something about spending the experience points in enchanting or anvils. I'm not a coder, but it is weird

[nexquin]

I died with about 30 levels and spawned back with 120 the first time I died using this mod. I lowered the percentage of XP to return on death in the settings but it's still not really accurate.