Switch region, forced to download, cant escape.

I switched region to try to refresh the client or whatever and was force to download the patch again, I can't switch back to my previous region until its done. If this is a known issue and you guys were working on fixing it, why after 6 years, its still a problem?

http://forums.na.leagueoflegends.com/board/showthread.php?t=1732069