Device Names from Synology SRM

I recently configured the NextDNS on my Synology RT2600ac, and everything works smoothly except the face that device names that are being reported to the NextDNS are not really accurate. There are several devices with an “*” name in the list. Those that are somewhat identifiable on the list doesn’t show their accurate names either. I even tried to make sure that they are renamed properly on the SRM but that doesn’t help either. 
 

Any idea on how to fix this?