[Autocomplete] multiselect label bug

[aepp]

Label of Multiselect Autocomplete built with Downshift dosn't behave correctly

Expected Behavior

On focus label is shrunk, on blur not (if the field is empty)

Current Behavior

If label is used, it is shrunk initially. If set explicitly to shrik: false through props, then the label overlays the placeholder on focus. The issue occurs only on multiselect autocomplete.

Steps to Reproduce (for bugs)

I used the demo from v1 add added a label: https://codesandbox.io/s/x959lm916z Just click on the second autocomplete.

[oliviertassinari]

The issue occurs only on multiselect autocomplete.

@aepp The root of this behavior comes from these lines:
https://github.com/mui-org/material-ui/blob/d2f1bda01645716d2f0452dda383ce52f46f8d9c/src/Form/FormControl.js#L62-L64

We have made a tradeoff by only running the logic at the component initialization and by shrinking the label as soon as the startAdornment property is used.

[oliviertassinari]

I doubt it's will ever be important enough to worth complexifying the implementation on our side. So I'm suggesting we label this issue "won't fix".

[aepp]

Oh ok, thank you for lettin' me know. So there is also no possibility to override this behavior from "outside", right?