This why I'm posting...
If the Oops! page is working as intended, then it is unwanted. It interferes with the expected behavior/return of a DNS query. (I have already had to deal with this from my ISP) I want my router to be transparent, especially to the rest of my network users. If a DNS request times out, I want to know it times out. However, there does not appear to be a checkbox to turn the Oops! page off, without turning off DNS Relay completely. Also, I don't consider a DNS timeout to be a network problem, yet am randomly informed of such "problems" as I browse the web.
Rather, I would expect to see the Oops! page if the router has been disconnected or has not yet obtained DHCP information from the uplink side when I attempt a DNS query. However, even in this case I would also expect an option to disable the Oops! page as not all people will want it.