Ionic 4, Android 5.1.0 Styles display incorrectly

When I compile for Android 5.1.0, with polyfills uncommented in src/polyfills.ts, (otherwise it does not even load), the styles are all messed up. I suposse it is because of the shadow-dom not working propertly with polyfills.

But if I compile the app, even with the polyfills activated, for 5.1.1 or more, everything works great.

Do you have any idea of what might be happenning?

Thanks,

This forum is inactive. I can not understand why. No answers in most of my questions.