Large Device Scans Succeeding but not getting added to the database

While testing this we were trying to add one of our /23 subnets to pull in all of our client's routers. When we do this the Device Scan Log says TRUE for Device added but never shows up in the device screen. But if we do 20-30 IP's at a time it works fine and adds in. No logs gathered from backend yet, let me know if you want any logs.