Domoticz

I have a question about the topology matrix.

I was inspecting my matrix and discovered it's not symmetric:



For example node 8 connects to 11, but 11 not to number 8.

I thought this matrix would be always symmetric.

Is there someone who can help me to understand this picture?

I appreciate all help

Reason is quite simple: during discovery node 8 was able to reach and 'see' node 11. So it has this node in his 'neighbor' list.
However, node 11 did not see node 8 and did not add it to its own 'neighbor' list.
Could be due to small differences in positioning, antenna, receiver, sender of these nodes.