Why are Flexbox blocks not displaying correctly in IE11?

Question

css

The page in browsers is displayed normally, but in IE11 everything goes.
I'm using an autoprefixer set to "last 3 versions".
If you come across, tell me how to solve it, it's cool if it can be automated by Galp, for example.

Answer 1

because the support is partial. caniuse.com/#search=flexbox

Answer 2

Not supported, and unlikely to be in the next 5 years

Answer 3

I have everything right