Rules in 16800 don't work?

[FinPeter]

This is strange, is there a bug or am I missing something here:

Let's say password is WORD123. I have following files:

test.hash containing single hash (16800) of the password
test.rule containing single line: $1$2$3
word.dict containing single line: WORD
word123.dict containing single line: WORD123

This is odd:

hashcat -a 0 -m 16800 test.hash word123.dict 

works as expected and cracks the password almost immediately. However

hashcat -a 0 -m 16800 test.hash word.dict -r test.rule

gives me "Exhausted".

Single line rule works, because

hashcat -a 0 word.dict -r test.rule --stdout

gives me WORD123 as expected.

Also, same password in SHA-1 and Office 2013 hashes works as expected. I'm using Hashcat 5.1.0 in Windows and 1080 GPU.