LQI is not coming in xctu network topology while using xbee 3

I am using xbee3 modules, One as coordinator and other as router.
In xctu network topology I can see both modules connected, but link between them is dotted and can’t see both lqi value, showing ? from router to coordinator side, eventhough they are kept beside.

I have even tried with multiple modules but all of them showing same behaviour discribed above, but with xbee pro s2c its working fine. Why?

After a few seconds, it showed both LQI values automatically.