Not able to see more than one resource in Who's Nearby

Summary:

Hi Team,

We have three resources (A, B and C) logged in -one from laptop (A), one from ipad (B) and one from android phone {C}. All three are at same location. Location is enabled for all three resources. All three are shown online with green dot mark but when we try to search and they can chat with each other.

But, when A is trying to find nearby resources in collaboration, he can see only one resource i.e. C and not B. Same is happening when B is trying to search nearby resource, he can also see only C and not A.