Android: Fuse crashes on app relaunch if restoring saved state

[breautek]

FATAL EXCEPTION: main
Process: com.breautek.fuse.testapp, PID: 30712
java.lang.NullPointerException: Attempt to invoke interface method 'void com.breautek.fuse.FuseContext$IReadyCallback.onReady()' on a null object reference
	at com.breautek.fuse.FuseFragment._onContextReady(FuseFragment.java:87)
	at com.breautek.fuse.FuseFragment$$ExternalSyntheticLambda1.onReady(D8$$SyntheticClass:0)
	at com.breautek.fuse.FuseContext$$ExternalSyntheticLambda2.run(D8$$SyntheticClass:0)
	at android.os.Handler.handleCallback(Handler.java:959)
	at android.os.Handler.dispatchMessage(Handler.java:100)
	at android.os.Looper.loopOnce(Looper.java:232)
	at android.os.Looper.loop(Looper.java:317)
	at android.app.ActivityThread.main(ActivityThread.java:8705)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:580)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:886)

$fuseCB appears to be null in this situation, even though it seems to be coming through on create. Further investigation is required.