Solo queue Rating change bug or?

Hello, is this rating difference intended?
I mean when i win 4 matches i get like 20 rating and when i win 2 then i lose 50?

[indent preformatted text by 4 spaces](https://ibb.co/LXzKFdFc)

your cr war above your mmr which means you did lose some lobbies in a row
by going 2-4 you lost only 20 mmr which is fine and how it always works
cr gains/loses are always about your mmr vs average mmr of your role