Transactions are not created after applications activity is closed by Android

[krystofwoldrich]

Description

When I enable Don't keep activities in the Android Developer menu (simulates behavior of low memory when the system will close the activity, but keeps the app process), the ReactNavigationIntegration stops creating spans after reopening the application.

Related to

sentry-react-native/packages/core/src/js/tracing/reactnavigation.ts

Lines 137 to 146 in 6496212

	/* We prevent duplicate routing instrumentation to be initialized on fast refreshes
	Explanation: If the user triggers a fast refresh on the file that the instrumentation is
	initialized in, it will initialize a new instance and will cause undefined behavior.
	*/
	if (RN_GLOBAL_OBJ.__sentry_rn_v5_registered) {
	logger.log(
	`${INTEGRATION_NAME} Instrumentation already exists, but register has been called again, doing nothing.`,
	);
	return undefined;

[krystofwoldrich]

Fixed by #4641