Uniwind on Hermes V1 does not apply styles correctly on app start

[AdiRishi]

What happened?

This issue occurs on Expo SDK 55 (beta) with Hermes v1 enabled (see repro for exact setup).

uniwind-hermes-v1-bug.mp4

• As shown in the above video, when the app first loads, the p-12 padding on each page is completely missing.
• By going to the editor and pressing save on a file, the refresh seems to fix something and then the padding is applied correctly.

Good to note:

• I've confirmed this behavior does not happen if you revert the hermes v1 changes and simply use Expo SDK 55 with its default setup.
• This also does not occur on the IOS build, only on Android.

Steps to Reproduce

1. Clone the repository
2. Run pnpm expo prebuild
3. Run pnpm android to build the project and start the Android emulator
4. Close the app, then open it again, you should see both the home and explore tabs have been pressed against the top of the page, due to missing padding
5. Go to your editor and save the home-screen.tsx file, triggering a HMR refresh. The padding should now be visible

Snack or Repository Link

https://github.com/AdiRishi/expo-uniwind-starter

Uniwind version

1.3.0

React Native Version

0.83.1

Platforms

Android

Expo

Yes

Additional information

• I've searched for similar issues in this repository and found none

[Brentlok]

Hi, the problem is not with p-12 it's an issue with safe area, SafeAreaListener fires before listeners for the components are mounted

[AdiRishi]

Hey @Brentlok , thanks for checking :)

I'm a bit new to Expo / mobile dev so apologies if this is a dumb question - Just to confirm, is this something Uniwind can fix, or is it a more core issue that should be raised elsewhere?

[Brentlok]

Hey @Brentlok , thanks for checking :)

I'm a bit new to Expo / mobile dev so apologies if this is a dumb question - Just to confirm, is this something Uniwind can fix, or is it a more core issue that should be raised elsewhere?

We can easily fix that

[AdiRishi]

Can confirm the fix works as of v1.3.1. Thanks for the super quick response 😄

[jpudysz]

Awesome!