Void World, Unlimited XP from.. WALKING?!

[Emblin]

I encountered a very strange bug on the modpack Void World.

When I walk on the ruins, around 0-60 Y or something like that, I get !@$% tons of XP from WALKING. If I sprint the generation is greater. When I jetpack above the ground just slightly I earn no XP.

When I walk on my sky home, at about 200 Y, I get no XP at all from walking.

Wtf is happening? I've earned over 100 levels in like a minute

 

[Emblin]

WOW. Just to make it even STRANGER than before, I apparently found out that I only earn XP if I'm in down below on the ruined city, and if I walked over a specific block I have never yet stood on. Running back and forth yields no XP, but just running straight to new areas gives me more

*EDIT*

I found the culprit. Apparently crap tons of XP orbs were covering the whole city and I couldn't even see them unless I turned on my dark armor's night vision.

 

[Emblin]

Anyone know why this happened?

Spoiler: Xp orbs screenshot

 

[adamich]

try switch to peaceful mod and test.

 

[Type1Ninja]

try switch to peaceful mod and test.

That won't remove the xp orbs; it will only remove any mobs which might somehow die and drop more, which doesn't seem to be the issue.

 

[Emblin]

I switch to peaceful quite frequently because the lag can be pretty intense while playing with mobs. So peaceful changes little

 

[ScottulusMaximus]

I switch to peaceful quite frequently because the lag can be pretty intense while playing with mobs. So peaceful changes little

Well all those orbs are probably murdering your FPS, I would use OPIS to delete them

 

[adamich]

"That won't remove the xp orbs" but can remove the mobs that die and drop that xp orbs)
all we need is known why mobs die at respawn tick.