CopyQ menu() blink and crashing #macOS

When you display the menu tray, it appears for a moment and then disappears. But sometimes it does not. And then it crashes after a few times.

But if I show the main menu (CopyQ toggle), it works every time and the bug doesn't happen at all - and it never crashes.

See the video for more info.

https://github.com/user-attachments/assets/f10b1e0c-4492-4aab-bed6-7b74d5b2b2e6

```
CopyQ Clipboard Manager 9.0.0-gdc155ef9-master
Qt: 6.7.0
KNotifications: 5.249.0
Compiler: GCC
Arch: arm64-little_endian-lp64
OS: macOS 14.6
```