it is normal hotspot gives dhcp you will only be able to see those ips given by the hotspot according to my experience you have to disable the hotspot for the time you want to ping clients or you ping using the ips delivered by the hotspot
In my years of experience I came through a very strange distortion unit An old tv. maybe in this small community someone has it ; this is not the answer but it might be try to elevate your antenna el little bit more