[Koha] Problems searching callnumbers with Koha and ICU

[Mason James]

Hi Folks
Has anyone hit a problem searching callnumbers with Koha and ICU - specifically callnumbers with SPACE ' ' characters?
An example problematic callnumber is 'PZ 7 .W663 1984'
 
Or, has anyone had *success* searching callnumbers with ICU? :)
Either way, I'd be curious to hear from you

I tested on Koha 18.05.12 and Debian 9.8


Cheers, Mason