Demoted with no warning
Got demoted from silver 3 to silver 4 with no warning. Wasn't losing an absurd amount of games either.
2 Comments
https://support-leagueoflegends.riotgames.com/hc/en-us/articles/204010760-Ranked-Play-FAQ There's no warning outside the shielding period. Maybe your hidden MMR was just at the limit of Silver 4 and a few losses were enough.
DEMOTIONS A particularly bad losing streak may result in dropping a tier or division, though there’s no set number of games that may trigger a demotion. Losing enough games at 0 LP can drop you into the next-highest division. If you’re in division IV, it’s possible you’ll even drop a tier. After a demotion, your LP will be set to 25 or 75, depending on how many losses you had at 0 LP.
After being promoted into a new division or tier, you’ll gain the effects of a demotion ‘shield,’ which prevents you from dropping. This is to keep you from winning a series, losing a few games and then immediately dropping back to where you were. The shield lasts for 3 games after advancing a division, and 10 games after advancing a tier (3 games for Master tier).