Potential Unicode bug?

Continuing the discussion from Why is Window.bounds relative to bottom left?:

Unfortunately, Mᴉupoʍ doesn’t seem to work as a symbol…

'Mᴉupoʍ'  // returns a symbol

\Mᴉupoʍ

ERROR: syntax error, unexpected NAME, expecting end of file
  in interpreted text
  line 1 char 8:

  \Mᴉupoʍ 
       ^^^

This means this happens…

Mᴉupoʍ {

}
compiling class library...
	Found 853 primitives.
	Compiling directory 'C:\Program Files\SuperCollider-3.13.0\SCClassLibrary'
	Compiling directory 'C:\ProgramData\SuperCollider\Extensions'
	Compiling directory 'C:\Users\**\AppData\Local\SuperCollider\Extensions'
	Compiling directory 'C:/Users/**/sclib'
Expected ':' or {.  got token: 'upo' 258
  in file 'C:/Users/**/sclib\Classes\test.sc'
  line 1 char 7:

  Mᴉupoʍ {
      ^^^
  
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Could this be a bug with the unicode implementation during lexing?