Bug report: “unescape” operation is confusing

**Describe the bug**
Unescape doesn’t deal with some characters correctly

**To Reproduce**

https://gchq.github.io/CyberChef/#recipe=Escape_Unicode_Characters('\\u',false,4,false)Unescape_string()&input=wrUg4oKk

**Expected behaviour**
I expect that the “unescape” should cancel the “escape” step, and give back the original characters.

**Screenshots**
(Let me know if the recipe doesn’t make it obvious.)

**Desktop (if relevant, please complete the following information):**
- OS: macOS
- Browser: Firefox 111
- CyberChef version: 10.4.0

**Additional context**
N/A