Performance Issues after Upgrading from Expo 45

SDK Version: 46,47,48,49
Platforms(Android/iOS/web/all): iOS, Android
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Since upgrading from Expo 45, our application seems to have noticeable performance issues. In particular it seems that in Expo 45 and previous SDKs, async functions would process separately and would not block the UI, however, now it appears that the UI is being blocked by async functions being called.

One example is that our app has a number of async functions that make API requests when it is initially opened. In the past, the app would load the initial screen while these requests where occurring. Now it seems to block the rendering of the initial screen until after these requests have completed.

Has anyone else noticed a similar performance regression after upgrading from expo 45? We have not introduced any new changes apart from the SDK upgrade. The build using Expo 45 does not have these issues, while the Expo 46, 47, 48 and 49 builds all do. Any advice?

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