When setting/pasting/etc., blocks are missing or partially connected (NOT default states)

**Versions**

WorldEdit version: build 5093
Platform version: Spigot 1.16.1

**Describe the bug**

The block states of wall , glass panes and fences are not maintained when copied , then flipped and pasted

**To Reproduce**

1. ... select pos1 and pos2
2. ... //copy
3... //flip
4... //paste
**Expected behavior**

expect to have a mirrored block state of the blocks and connectivity maintained

**Screenshots**

**Additional context**