This feature is only supported in Wurst versions for Minecraft 1.15.2.
This allows the player to use the Donkey Inventory Oversight to duplicate items. This exploit was patched by Mojang in snapshot 20w16a, which is why the MountBypass hack is not supported in Minecraft 1.16 and later versions.
The server type can be determined by pressing F3. The server type should be the third line.
|Server Type||IllegalStack Plugin||MountBypass||Duplication|
|Paper||No||Not Necessary||Yes, on older Paper versions|
|Paper||Yes||Necessary||Works on IllegalStack versions below 2.1.1(?)|
|Waterfall, Tuinity, BungeeCord||n/a||n/a||Does not work at all|