[Bug]: Uncaught Error: ChangeTree: missing index for field "undefined"

[WeylonSantana]

Context

I'm getting this uncaught error on client side, caused by a Map Schema (or a map inside another map maybe)

Bug description

obtain instances of schemas through map get, and modify their values (or in my case, specifically the name: string or revealed:boolean value, causes an error on the client side, it is not even necessary to send a packet to the client, the error happens instantly when modifying the property

Uncaught Error: ChangeTree: missing index for field "undefined"
    at ChangeTree2.assertValidIndex (colyseus__js.js?v=5fb6481a:1048:21)
    at ChangeTree2.touch (colyseus__js.js?v=5fb6481a:956:18)
    at ChangeTree2.touchParents (colyseus__js.js?v=5fb6481a:965:39)
    at ChangeTree2.change (colyseus__js.js?v=5fb6481a:952:18)
    at _.set [as name] (colyseus__js.js?v=5fb6481a:1840:31)
    at Schema2.decode (colyseus__js.js?v=5fb6481a:2928:34)
    at SchemaSerializer.patch (colyseus__js.js?v=5fb6481a:4344:27)
    at _Room.patch (colyseus__js.js?v=5fb6481a:3698:25)
    at _Room.onMessageCallback (colyseus__js.js?v=5fb6481a:3681:16)

Reproduction

i have this code

async changePlayerCards(reveals: boolean = false, targets?: Array<Target>) {
    const { selectedTargets } = this.state;
    if (!selectedTargets?.length && !targets) return;
    const realTargets = targets ?? selectedTargets;

    const deckTarget = realTargets.find((t) => t.playerId === 'deck');
    if (deckTarget) {
      const target = realTargets.find((t) => t.playerId !== 'deck');
      if (!target) return;
      const targetPlayer = this.state.GetPlayerById(target.playerId);
      const targetCard = targetPlayer?.cards.get(target.cardId);
      if (!targetCard) return;

      if (reveals) await this.killHero(target);

      this.state.deck.push(targetCard.name);
      targetCard.name = this.state.deck.shift()  // #### <<===== error happens in this line
      this.state.addTask(new Task(TaskType.ChangeCard, { sourceId: target.cardId, targetId: 'deck' }));
    }

//rest of code
}

Environment & Versions

Colyseus.js: 0.15.17

Workarounds

When obtaining the instance of schema through get

do not change its values

instead
const targetCard = targetPlayer?.cards.get(target.cardId);
targetCard.name = this.state.deck.shift()!

do a re-set of value again, my solution:
targetPlayer?.cards.set(target.cardId, new Card(this.state.deck.shift()!, false));

with that i have no problems for now.