Versions
WorldEdit version: WorldEdit version 7.2.0 (latest)
Platform version: Paper version git-Paper-655 (MC: 1.13.2) (Implementing API version 1.13.2-R0.1-SNAPSHOT)

Describe the bug
After setting some blocks, the same blocks that were placed occur additional as dropped items. So the blocks are set, but they also are dropped as items.
Example: We are doing '//set stone' (or '1') and 9 cobblestone are dropped. But the 9 stone are also placed as cleanstone.
That also happens on an empty server with just WorldEdit installed.

To Reproduce

1. Copy and paste (or just set) any blocks

Expected behavior
The blocks that were set or pasted shouldn't appear additionally as dropped items

Screenshots
Video: https://youtu.be/RDYLKi9NjG8

looks like it might have been caused by EngineHub/worldedit-adapters@95fde29#diff-5ae373a36862f0fbab41d5a196a02200c6973bc976bae13e24608c44c906ef7aR69
as that's the only change i can see between beta4 and beta5 to the 1.13.2 adapter.

Going to close this as we only support the latest version of Minecraft. If it can be reproduced in 1.16.4, then we can re-open, or if someone would like to do the detective work themselves and PR the adapters repository we will also accept that.