Riot elo decay problem
About two weeks ago I got a notification on my client saying my elo was going to decay in 9 days if I didn't become active in ranked. ( I was at Diamond 5 wiht zero points) and I figured "okay that's fine, that's plenty of time to get ready" I logged on 5 days later to see a new notification and a pop up saying I got demoted to Plat 1... Is this a bug or can someone explain it to me?