Describe the bug
Arrow disappears after switching tabs.

To Reproduce
Steps to reproduce the behavior:

1. In tab A, mermaid.init a
2. Switch tab to B
3. In tab B, mermaid.init a'
4. Switch tab to A
5. Switch tab to B
6. Arrow disappears

Expected behavior

Arrows do not disappear after switching tabs

Screenshots

Code Sample

flowchart TB
  WebSocket --> Game;
  subgraph Game;
    createmap[创建地图] --> nextstep[等待下一 步操作] -->  judge[Jugde];
  end

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [chrome]
• Version [e.g. 106.0.5249.61]