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Please include a sample project that reproduces your issue.

Sample project attached. Just add to plain project this dependencies allow to reproduce.

def emoji2_version = "1.1.0-beta01"
implementation "androidx.emoji2:emoji2:$emoji2_version"

def lifecycle_version = "2.5.0-alpha01"
implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"

The reason may be related to this change, which check itself before it is initialized. Use 2.4.0 of lifecycle-process as workaround.

Yes, this is due to this change, as well as the fact that EmojiCompatInitializer has a ProcessLifecycleInitializer as a dependency and also re-calls it, but in manual mode.

ProcessLifecycleInitializer is expected to already be initialized (via the manifest provider for App Startup) by the time that code runs - App Startup shouldn't be calling create if that component has already been initialized, hence you shouldn't get any exception. We'll take a look on where things are breaking down though.

Thanks for the answer.

As I understand EmojiCompatInitializer has ProcessLifecycleInitializer as a dependency. That is mean, the ProcessLifecycleInitializer must be executed before the EmojiCompatInitializer, which in its create method calls the delayUntilFirstResume method, which in turn calls the ProcessLifecycleInitializer via appInitializer.initializeComponent(ProcessLifecycleInitializer.class)

Maybe it would be more correct to create a bug in emoji-2, but let it be here.

This issue isn't related to emoji2, it could be reproduced easily with the lifecycle-process (2.4.0 -> 2.5.0-alpha01) only.