I cant speak for R81.20 for smart-1 cloud yet, but I recall when CP did upgrade for a customer who had R80.40 smart-1 cloud to R81.10, they noticed some geo warnings about few countries and warnings definitely did not make sense, as they indicated that those countries did not exist or something along those lines(well, no way they could have disappeared off the map in few hours...lol).
Anyway, we called TAC and guy who had access to backend did something and fixed the problem, though he never told us exactly what was done.
Are you able to send details of the warning?