Mesh status screen - not resolving node names

Hi,

I’ve noticed some odd behavior with the mesh status screen. 
Some remote nodes resolve to their proper node names while others stay as ip addresses only. 
This is observed with 4 nodes. 2 are UBNT PBE-m5 and 2 are Mikrotik LDF-5nD. 
While jumping from node to node and looking at their mesh status screens, each node resolved different node names while showing ip addresses for others. 
Is that normal/expected?
All nodes are on latest nightly builds. 

73
Yoram 4Z5YR