Dropped a Rank after update

After the Olympus Winter wildcard update went through,  I was dropped one whole rank level. Closed the game in Plat 3, opened it and now I'm in Plat 4. Wouldn't bother me too much if I hadn't been closing in on Plat 2. Now I'm numerous hours behind where I was. Glad to see I'm not the only person reporting this issue.