No WiFi connection after upgradeing WIFI



i’ve got 150 gxv3370 devices in my network. All of them are connected through wifi. After we upgraded the wifi network to the latest firmware of the accespoints, 70 of them are not reconnecting to the wifi network. There are 2 solutions, pick up the phone. Or power down the device.

When picking up the phone it takes 30 seconds and then he reconnects.

Are this familiar to someone?