The most often affected routers are the D-Link model DIR-655 and DIR-855 routers but there are a few others, as well. The issue is not region specific, as all users are affected.
Some users were able to get around the bug by changing the cypher type to TKIP, but that has also had adverse affects on other devices within their networks.
D-Link was quick to issue a statement as they search for a permanent solution: "Recently, a limited number of customers have reported connection issues between their D-Link wireless router, including the DIR-855 and DIR-655, and the Samsung Galaxy S4 handset. Problems include intermittent disconnection from the wireless network, especially while browsing YouTube. Other devices continue to function normally. The problem has also been reported with wireless routers from other manufacturers. D-Link is actively researching this issue now to determine the cause."