Good news is that I have been running 15 Beta 1 on my AC86 for five days and everything is fine and no spinning wheel on the VPN Server page. VPN Server works fine. The not so good is that the VPN Server1 is filling up my logs with multiple entries every several minutes. Log is set to record info/debug. Not a huge issue as the log resets approximately every 20 hours meaning it is hard to research other issues.
I will try a reboot when wife isn't on line and will yell at me for downing the Internet. Haven't tried a reboot previously as I did want to see if the router could go five days and no spinning wheel.
VPN logging verbosity is configurable on the VPN config page. A normal VPN set to the default logging levels should not generate log activity, unless something is causing your connection to constantly go down.