Getting "Error: Unimplemented" when using moveOver transitions

[AriasBros]

Hi,

I am getting the error Unimplemented when I try to use the moveOver transitions (anyone, I tried with the four transitions).

The exception is thrown only when I change to other route where the same component is used. For example, I use the component in /teams and /team/1 routes, so, if I try to navigate between these routes, I got the error. If I navigate to some of these routes from other route (/leagues, for example), the error doesn't happen.

I have this in my component:

  <AnimatedContainer class="player-slot__footer__animated-container">
    {{#animated-value this.price rules=this.rules as | price |}}
      <div class="player-slot__footer__price">
        <span class="player-slot__footer__price__amount">
          ${{format-number price minimumFractionDigits=1 maximumFractionDigits=1}}m
        </span>

        <Player::Revaluation @player={{this.player}} @type="season" class="player-slot__footer__price__revaluation" />
      </div>
    {{/animated-value}}
  </AnimatedContainer>

  rules({ oldItems, newItems }) {
    if (oldItems[0] < newItems[0]) {
      return toDown;
    } else {
      return toUp;
    }
  }

I am not using a bug issue for this because, as the exception say, what I am trying to do seems to be an
unimplemented thing. But I can't understand what I am doing "wrong" to get this exception, I am following the examples in the documentation.

Can someone say me a workaround to this problem?

I attach 2 screenshots with the exception.

[stukalin]

Same here with the {{animated-if}}...

[fusion2004]

It seems to do with the moveOver transitions always expecting there to be a kept or inserted sprite. I ran into this with {{animated-if}} and I was able to fix it by adding an empty div as an else case!

<AnimatedContainer>
  {{#animated-if this.errored rules=this.rules}}
    <MyErrorComponent />
  {{else}}
    <div></div>
  {{/animated-if}}
</AnimatedContainer>

[RobbieTheWagner]

@ef4 any chance we could get rid of the unimplemented errors entirely? We have one we cannot even make happen, but happens under some random conditions, and starts blowing up our error log.

[ef4]

Yes, absolutely. The error is called "unimplemented" because it's just not written, there's no fundamental limitation. Please do implement.

[Benkooo]

Any update regarding this error please?