Draytek 3200 (Non WiFi)
We had a power outage this week and since then when I log on to the router as an admin I am in a lower level of access and in more restricted areas of the menu such as filter setup the device displays the warning -

Authorization Required !

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Browser not authentication-capable or authentication failed.

Normal admin menu items such as User Management are missing and status Invalid is displayed in the bottom left of the menu for restricted areas of the menu.
This can also happen in the middle of a session.
Presumably the admin user is being degraded to a lower level of access.

I have re-applied the firmware using the .rst file and then reconfigured the router from scratch and it is still happening regardless of machine or browser I use to navigate the menu.
The only way round seems to be power down the router and power it back on to temporarily solve the problem.

Any suggestions?