Using route & Observable

Fuse version: 0.30.0
OS: macosx 10.12.1

Using router.goto(), some errors occur.
All of index (initial)page’s animation & functions works.
But after I changed page using router.goto, some function using Observable make crash.

My error log is below. is code needed?

    System.NullReferenceException occured.
      at Fuse.Animations.EasingTrack.Fuse.Animations.ContinuousTrackProvider.GetSeekProgress (Fuse.Animations.TrackAnimatorState tas, Double progress, Double interval, SeekDirection dir, Uno.Float4& value, System.Double& strength) <0x17fdda50 + 0x000aa> in <filename unknown>:0 
      at Fuse.Animations.EasingTrack.Fuse.Animations.ContinuousTrackProvider.GetSeekTime (Fuse.Animations.TrackAnimatorState tas, Double elapsed, Double interval, SeekDirection dir, Uno.Float4& value, System.Double& strength) <0x17fdd808 + 0x00154> in <filename unknown>:0 
      at Fuse.Animations.TrackAnimatorState.SeekTime (Double elapsed, Double interval, SeekDirection dir, Double strength) <0x17fdd540 + 0x00110> in <filename unknown>:0 
      at Fuse.Animations.Player.UpdateStates (Boolean isInterval) <0x17df7e10 + 0x00133> in <filename unknown>:0 
      at Fuse.Animations.Player.CheckUpdate (Boolean interval) <0x17df7c28 + 0x000d3> in <filename unknown>:0 
      at Fuse.Animations.Player.PlayToEnd () <0x17fdf560 + 0x00037> in <filename unknown>:0 
      at Fuse.Animations.TriggerAnimationState.PlayOn () <0x17fdf520 + 0x0002f> in <filename unknown>:0 
      at Fuse.Animations.TriggerAnimationState.PlayEnd (Boolean on) <0x17fdf4d0 + 0x0001b> in <filename unknown>:0 
      at Fuse.Triggers.Trigger.PlayEnd (Boolean on, System.Action done) <0x17df5d88 + 0x0017b> in <filename unknown>:0 
      at Fuse.Triggers.Trigger.DirectActivate (System.Action done) <0x1e0ee898 + 0x00023> in <filename unknown>:0 
      at Fuse.Triggers.Trigger.Activate (System.Action done) <0x17df54b0 + 0x00047> in <filename unknown>:0 
      at Fuse.Triggers.WhileTrigger.SetActive (Boolean on) <0x17fe7048 + 0x0002b> in <filename unknown>:0 
      at Fuse.Gestures.WhilePressed.CheckStatus (System.Object s, System.Object a) <0x1e0e93f8 + 0x000fb> in <filename unknown>:0 
      at Fuse.Input.PointerPressed.Invoke (Fuse.Input.PointerPressedHandler handler, System.Object sender, Fuse.Input.PointerPressedArgs args) <0x1e0eb7a0 + 0x0001c> in <filename unknown>:0 
      at Fuse.VisualEvent`2[THandler,TArgs].InvokeInternal (Fuse.THandler handler, System.Object sender, Fuse.TArgs args) <0x1e0e8498 + 0x0002c> in <filename unknown>:0 ```

It’s a bit hard to understand without seeing your code. Could post a small code snippet that reproduces your issue.