craftbukkit/nms-patches/net/minecraft/world/entity/monster/EntityRavager.patch

--- a/net/minecraft/world/entity/monster/EntityRavager.java
+++ b/net/minecraft/world/entity/monster/EntityRavager.java
@@ -170,7 +170,7 @@
                     IBlockData iblockdata = this.level.getBlockState(blockposition);
                     Block block = iblockdata.getBlock();
 
-                    if (block instanceof BlockLeaves) {
+                    if (block instanceof BlockLeaves && !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityChangeBlockEvent(this, blockposition, net.minecraft.world.level.block.Blocks.AIR.defaultBlockState()).isCancelled()) { // CraftBukkit
                         flag = this.level.destroyBlock(blockposition, true, this) || flag;
                     }
                 }