Styling issues with emulator

Hello everyone, we are finally testing our app in some android devices. On all devices the app just looked fine, see image below:

But as we don’t want everytime to deploy to devices, we are emulating the app on our windows machines.

I’m targeting the emulator to run on AVDs Android 5.1.1, same as most of the devices we’ve tested on, but here is how it’s looking like:

To preserve the identity of our project I had to hide the texts, but I think the difference is clear

Is that a known issue?