Passing larger plugin call (10MB) freezes UI

We do have an issue in our app. We would like to send some data from JS to our native side. We use plugin calls for that. We don’t await the results on the JS side, we don’t run blocking code on the native side, however, the UI freezes for around 1-3s.

We are assuming the bridge, messagehandler or something along these lines run code on the UI thread.

Is this known? Is there anything we can do?