JTR Hex Rules not working on opencl?

[Snoopy]

When trying answering to this https://hashcat.net/forum/thread-9773.html

i found this old/resolvded issue  https://github.com/hashcat/hashcat/issues/1580

and hahscat wiki says, hashcat is 100% compatible with jtr rules but when trying to use a hex-rule like

Code:

sa\xc3a4

hashcat responds with

Cannot convert rule for use on OpenCL device in file ruletest.txt on line 1: sa\xc3a4

any ideas?