@Full and unquoted argument

#1
Hello. I've got strange results.

Current directory is "Z:\PortableApps"
It is working fine in TCC/LE

Code:
[Z:\PortableApps]echo %@full[c:\Program Files]
Z:\PortableApps\Files\c:Program
It looks wrong. Even if quoting would be required.

TCC 17.00.69 x64 Windows 7 [Version 6.1.7601]

Merry Xmas :)