ALTERNATE_CURRENT incorrect event cancellation

[Teslicek]

Expected behavior

When placing REDSTONE next to a SHORT_GRASS (or any other flower) that is above a block that is not GRASS_BLOCK (such as DIAMOND_BLOCK) in a region, in which you do not have the permission to place blocks, you would expect the SHORT_GRASS to not be broken, as the plugin is cancelling the place event.

Observed/Actual behavior

The SHORT_GRASS is broken even when the event has been cancelled by the plugin.

Steps/models to reproduce

1. Download WorldGuard and WorldEdit
2. Set the redstone-implementation in paper config to ALTERNATE_CURRENT
3. Create any region
4. Inside the region, using WorldEdit, set SHORT_GRASS (or any other flower) above a block, such as DIAMOND_BLOCK
5. Make sure you do not have the permission to place blocks in the region
6. Place REDSTONE next to the SHORT_GRASS
7. The SHORT_GRASS will be destroyed

Plugin and Datapack List

[11:17:22 INFO]: Server Plugins (2):
[11:17:22 INFO]: Bukkit Plugins:
[11:17:22 INFO]:  - WorldEdit, WorldGuard

Paper version

[11:16:50 INFO]: This server is running Paper version git-Paper-436 (MC: 1.20.4) (Implementing API version 1.20.4-R0.1-SNAPSHOT) (Git: 850b736)
You are running the latest version

Other

This bug only happens, when you use redstone-implementation: ALTERNATE_CURRENT, but when you use VANILLA as the value, it works normally.

I already contacted the developers of WorldGuard, but was told to report this bug to paper.

[Lulu13022002]

Affect the BlockPlaceEvent