Versions
WorldEdit version: WorldEdit version 7.2.0-SNAPSHOT+4997-2363440
WorldGuard version: WorldGuard version 7.0.3-SNAPSHOT;2033-5e7829c
Platform version: git-Paper-267 (MC: 1.15.2) (Implementing API version 1.15.2-R0.1-SNAPSHOT)

Describe the bug
If a 2x2 tree grows at the edge of a region Podzol blocks are placed in the neighbouring build deny region.

To Reproduce

1. Create two neighbouring regions. Give yourself rights on one region and set the other region to build deny.
2. Plant a 2*2 spruce on the border of the build deny region and let it grow using bone meal.

Expected behavior
In regions where building is not allowed, block changes should not be possible.

Additional context
There are no errors in the log.

last time i looked at this, bukkit just doesn't tell us about these blocks being created. might need investigation.

just to double check... "let it grow using bonemeal" is contradictory...if you are forcing it to grow using bonemeal, the player using the bonemeal is included in the cause and the tree will grow if that player has build perms (or has bypass, etc). if you let it grow naturally, then it should be protected.

I think your case falls into the former, as I can't reproduce this with natural growth.

A player can place leaves and podzol in a region for which he has neither a bypass nor building permissions by growing a tree using bonemeal. As long as he has permissions for the area of the trunk, the rest of the tree generation process does not take neighboring regions into account. If I understand your comment correctly, the player should not be able to grow a tree if it could affect regions where he is not allowed to build. This system does not work correctly under the circumstances described in the ticket.

you can say that but it's not going to convince me when i just tested this myself.
natural growth https://i.imgur.com/uzofyy3.png
bonemeal no perms: https://i.imgur.com/p83xIQ9.png
bonemeal with perms: https://i.imgur.com/idbw9cN.png

Uff I need to figure out my problem then, thank you for your help!

GG :P

Joke aside, I already saw you commenting on my WGEF issue, so I knew you have already noticed it. For future reference: aromaa/WorldGuardExtraFlags#152

I finally figured it out, WorldGuardExtraFlags caused the issue, it's fixed! Thank you for your help!