Problem about Jetson NX search wifi

My NX Devkit is Jetpack 4.5.
After I select WIFI, the situation is as shown in Fig1. In the beginning, you can see other optional WIFI. But after a few minutes (here is a wait of 5 minutes), you will not be able to find other optional WIFI after you go to observe, as shown in Fig2. How can I solve this situation?

This seems to be network manager issue, not L4T BSP.
I don’t have answer for this.