State machine either crashes or doesn't start

Description

Hello there!
I've been playing with state machines on android and found something that seems not right.

The problem is that when I try to launch it, the only thing I can see is this exception

UPD: apparently the problem is that I use blend state without input just to combine multiple micro-animations. The web player is ok with that, but looks like android implementation is not. Can we unify that somehow?

java.lang.RuntimeException: Unable to start activity ComponentInfo{app.rive.runtime.example/app.rive.runtime.example.SimpleStateMachineActivity}: app.rive.runtime.kotlin.core.errors.StateMachineException: No StateMachine found with name main_machine.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3639)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3796)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2214)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loopOnce(Looper.java:201)
        at android.os.Looper.loop(Looper.java:288)
        at android.app.ActivityThread.main(ActivityThread.java:7842)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
     Caused by: app.rive.runtime.kotlin.core.errors.StateMachineException: No StateMachine found with name main_machine.
        at app.rive.runtime.kotlin.core.Artboard.stateMachine(Artboard.kt:141)
        at app.rive.runtime.kotlin.RiveDrawable._getOrCreateStateMachines(RiveDrawable.kt:339)
        at app.rive.runtime.kotlin.RiveDrawable._playAnimation(RiveDrawable.kt:355)
        at app.rive.runtime.kotlin.RiveDrawable.play(RiveDrawable.kt:194)
        at app.rive.runtime.kotlin.RiveAnimationView.play(RiveAnimationView.kt:301)
        at app.rive.runtime.kotlin.RiveAnimationView.play$default(RiveAnimationView.kt:296)
        at app.rive.runtime.example.SimpleStateMachineActivity.onCreate(SimpleStateMachineActivity.kt:58)
        at android.app.Activity.performCreate(Activity.java:8051)
        at android.app.Activity.performCreate(Activity.java:8031)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3612)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3796) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2214) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loopOnce(Looper.java:201) 
        at android.os.Looper.loop(Looper.java:288) 
        at android.app.ActivityThread.main(ActivityThread.java:7842) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) 

However, If i remove input, it just doesn't start

Provide a Repro

Just changed the file to the one I've attached in your SimpleStateMachineActivity sample, changed the state machine name to "main_machine" and added a call for boolean input which should launch the animationanimationView.setBooleanState("main_machine", "Dummy", true).

Source .riv/.rev file

repro.riv.zip

Expected behavior

Launched state machine. On the side note, I wonder, is it possible to make it automatically launched without using inputs?

Device & Versions (please complete the following information)

• Device: Android emulators
• SDK Level: 30, 31

Additional context

I'm using this repository with samples, I've updated the repository and the cpp submodule tp the latest version (maybe this is the problem), not sure. The built-in example works as expected though.

Start with the attached repro.riv.zip and app/src/main/java/app/rive/runtime/example/SimpleStateMachineActivity.kt, then trace the stack entries in Artboard.kt, RiveDrawable.kt, and RiveAnimationView.kt. Reproduce both the missing-input crash and the no-input behavior on the stated Android SDK levels; done means the state machine launches consistently and the automatic-launch behavior is addressed or clearly defined.