About firmware 6.4.2.1-r1

Products Enterprise Wi-Fi Networks
1

Firmware 6.3.5-r4 was assigned to XV2-2,
but there was a problem with the SSID hiding function,
so I upgraded to firmware 6.4.2.1-r1.

After the version upgrade, a phenomenon occurred in which the handy terminal could not be connected. Have any of you experienced a similar phenomenon? ?

2

@Nakamura_Kenya

Not sure if I understood the problem.

After upgrade, is the device not reachable?

Thank You.

3

The problem is not resolved.
I did a firmware switchback and returned it to the original firmware.