WiFi hotspot turns off on accessing UART

I have WiFi hotspot on Jetson that turns on automatically on powering up. This worked fine for over a month. When I try to access UART2, the hotspot turns off automatically. I do not have an additional screen and keyboard, and hence I currently access Jetson only through SSH. This means that I am not able to make sense of whether communication over UART is working fine.

How do I make sure that the hotspot does not turn off?

what WIFI module you are using in TK1? USB?
Jetson TK1 has ethernet port. You can try that.