Problem with bootstrap 3.7.0 styles compatible

[GetTaxSolutions]

Is it compatible with bootstrap 3.3.7? Because I can find some difference in the classes and design is misaligned and wrong. For example the class 'control-label ' into the input label element now is changed to 'form-control-label' and validation doesn't apply red color if the field is not valid. I'm using "@ngx-formly/bootstrap": "^2.0.0-rc.6".

Example:
https://stackblitz.com/edit/angular-fqxpmq
You can see that label of required fields is in black color after validation. It should be in red. Bootstrap 3.3.7 is using control-label class but here formly set only form-control-label and css doesn't apply style properly for old version 3.x of bootstrap.