Duplicate messageUpdate events in sharded bot

if (utils.invalidCondition(newMessage)) return;
const messageUpdate = new MessageHandler();
const handler = messageUpdate.createHandler(newMessage.interaction!.commandName);
await handler.messageUpdate(oldMessage, newMessage);

export class MessageHandler {
    constructor() {
        // do nothing.
    }

    createHandler(commandName: string): CreateHandlerReturnType {
        switch (commandName) {
            case "x":
                return new XHandler();
             // ...
        }
    }
}

export class XHandler extends BaseMessageHandler {
  async messageUpdate(oldMsg: Message<boolean> | PartialMessage, newMsg: Message<boolean> | PartialMessage): Promise<void> {
   if (newMsg.embeds[0].title !== "Something") return;
   await newMsg.reply({ content: "Test" })
}