I don't understand, please provide more detail. The non-searchable patron attributes are not listed. Are you talking about the REST API endpoint?
This is a bug Jake discovered and we were looking at it together but when coming up with a test plan for it we found bug 36302. We tried reproducing this again but weren't able to anymore. There appears to be something funky going on but I'll try to come back to it if/when we can reproduce it again.