It appears that the installer leaves my current network configuration in an incorrect state.
When the problem is present, on booting, it logs in my own network for a few seconds, then it reverts to ask "wireless authentication required" when you input the password, it logs again for a few seconds and then it returns to ask the same question. I deleted my own network, reboot, added it back again and it resolved this problem.
It appears that the installer leaves my current network configuration in an incorrect state.
When the problem is present, on booting, it logs in my own network for a few seconds, then it reverts to ask "wireless authentication required" when you input the password, it logs again for a few seconds and then it returns to ask the same question. I deleted my own network, reboot, added it back again and it resolved this problem.