Environment

Android API Level 26
RN 0.61.x
react-native-paper stable and alpha

Description

I noticed a problem with react-native-paper and react-native 0.61.x on Android API Level 26.
Doesn't happen on API Level 23 or 29.

When i open a Dialog inside a Portal it shows up weird.
Same problem with FAB.

The problem doesn't arise with RN 0.60.5.
It happens with the last versions of react-native-paper (stable and alpha).

Here are two attachments showing the issue:
RN 0.60.5

RN 0.61.x

P.S. don't pay attention to Icons in the bottom tab.

Reproducible Demo

Just start a new project with RN 0.61.x and put a FAB or a Portal inside it with react-native 0.61.x on Android API Level 26.

EDIT: Repository to reproduce the issue

P.S. I don't know if its RN issue or a RNP issue.
I also posted it here:
react-native-community/releases#140 (comment)