[3.2.0-beta1] going standby with opened equalizer -> crash

Description

When the equalizer is open AND no bands are changed, going directly into standby and back makes the app crash.
When the equalizer is open AND some bands are changed, going directly into standby and back doesn't make the bands slidable anymore

Expected behavior

no crash / bands are slidable every time

Actual behavior

see description

Steps to reproduce

1. open the eq
2. change the bands / don't change bands
3. go directly into standby and back

Crash log

java.lang.IndexOutOfBoundsException: Index: 20, Size: 20
	at java.util.ArrayList.get(ArrayList.java:437)
	at android.widget.ArrayAdapter.getItem(ArrayAdapter.java:393)
	at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:449)
	at android.widget.ArrayAdapter.getView(ArrayAdapter.java:415)
	at android.widget.Spinner.makeView(Spinner.java:712)
	at android.widget.Spinner.layout(Spinner.java:660)
	at android.widget.Spinner.onLayout(Spinner.java:622)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at androidx.constraintlayout.widget.ConstraintLayout.onLayout(ConstraintLayout.java:1915)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
	at androidx.core.widget.NestedScrollView.onLayout(NestedScrollView.java:1787)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at androidx.coordinatorlayout.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1183)
	at androidx.coordinatorlayout.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:870)
	at com.google.android.material.bottomsheet.BottomSheetBehavior.onLayoutChild(BottomSheetBehavior.java:232)
	at androidx.coordinatorlayout.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:888)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
	at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
	at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
	at com.android.internal.policy.DecorView.onLayout(DecorView.java:753)
	at android.view.View.layout(View.java:20693)
	at android.view.ViewGroup.layout(ViewGroup.java:6194)
	at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2799)
	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2316)
	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1463)
	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7190)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
	at android.view.Choreographer.doCallbacks(Choreographer.java:761)
	at android.view.Choreographer.doFrame(Choreographer.java:696)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
	at android.os.Handler.handleCallback(Handler.java:873)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:193)
	at android.app.ActivityThread.main(ActivityThread.java:6718)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
	at Android.MODEL(A0001)
	at Android.VERSION(9)
	at Android.FINGERPRINT(oneplus/bacon/A0001:5.0.2/LRX22G/YNG1TAS0YL:user/release-keys)

Context

App version

3.2.0-beta1

Android version

LineageOS 16.0 / 9 Pie

Device model

OnePlus one (bacon)