File input display change after 4.1 update

**Symfony version(s) affected**: 4.1

**Description**  
I've updated my symfony version on a project from 4.0.11 to 4.1, I'm using bootstrap_4_horizontal_layout form theme and all my file inputs display have changed to bootstrap custom file.
I don't think a framework update should change my input display like that.
Am I wrong ?
