Have you tried doing a factory reset and then restore configuration from before upgrade ?
Yep, I've now done all that and no change. However I have discovered that this phenomenon is indeed browser related. On Dolphin on iPad I can see the "missing security fields" and also on Windows 10 Internet explorer 11. Why this glitch should manifest itself on security fields related to 2.4 GHz but not 5 GHz is one of a number of mysteries but at least, as I suspected, my wifi security has not been compromised. I simply have to to be very choosey over the browser I use to interogate the router.
Yet another anoyance - I choose to have the bright blue LEDS switched off to prevent light contamination at night. However I like to schedule router reboots to keep the router OS fresh. After sceduled reboot the lights are always back on even though the checkbox says they should be off.
When I bought my first Draytek router about ten years ago I thought they were in a league of their own in terms of quality and reliability. Sadly, over the years, I have found that both hardware and software standards have slipped and I suspect that future router purchases will no longer be Draytek. In my experience there have been too many failures and glitches of late - two 2170Vn's I bought for my daughters both suffered hardware failure far too early in the life cycle.
