zChat.removeTags cannot remove tags when using Agent Workspace

zChat.removeTags didn't work in my custom Chat Widget.

It seems issue of Agent Workspace.

Flow

1. Add Tag and start chat → A ticket with "zopim_chat" and "test_tag" tag will be created.

zChat.addTag(['test_tag'])

2. Finish chat by zChat.endChat()

3. Reload browser and initialize chat widget

constructor() {
  zChat.removeTags(['test_tag'])
}

4. Start chat without adding tag

→ A new ticket with "zopim_chat" and "test_tag" tag will be created.

Conditions

 - Using Agent Workspace

 - Start chat again in a short time from same browser (Not same session? but something is same)