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R00tB33rMan
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Folia teleports the owner of a landed ender pearl to the pearl's current position, where vanilla and Paper use its position before the move that hit: at a wall the current position can lie on the hit surface and put the player's bounding box partly inside the wall. From PaperMC/Folia#529 by strobil.
Dueris
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Folia passes
this.position()toattemptTeleportwhen an ender pearl hits, while Paper usesthis.oldPosition(). At a wall impact, the current position can lie on the collision surface and place the player's bounding box partly inside the wall.Use
oldPosition()to match Paper's destination selection. The asynchronous teleport flow is unchanged.Testing
Twelve identical server-side pearl launches toward a barrier wall:
All 12 patched destination coordinates matched Paper within
1e-7.createPaperclipJarpassed with Java 25.0.4.1.Test harness, reproduction instructions and original JSON results.
The remaining overlaps also occur on Paper. These tests measure landing positions and overlap, not actual wall traversal; this is not a complete wall-phasing fix.