Comment 9 for bug 1316634

When the issue occurs, the network manager tells me that there are wireless networks available, but it does not connect automatically to the hidden network.

Probably there is some state that is stored in NetworkManager:
* When you have manually disconnected from a wireless network, you probably don't want to reconnect automatically.
* When you was connected to a wireless network, you probably want to reconnect to that network.
* When you have manually chosen a specific network, you might want to connect only to that network

There should be something like on mobile phones where you can choose one network manually or let the phone choose the network automatically.

Maybe some of such state information survives a reboot.