Try doing it at least half-way through the current round... it happens to me but it shows up (One address) after a while and btw, does CE and BlackOps3.exe consume a lot of RAM for you guys? Those two wasted 12GB of RAM when the scan for Array Of Bytes were done...
If the address doesn't appear when you go half-way through the match, then try just after the next round begins (Listen for the new round sound) then try to search for the array of bytes.