Why my app's icon on system tray turns blank after a few days

[sean.wu]

I have several self-developed apps which would display their own icon in the Win10 system tray. Initially, those icons were displayed well, and be able to respond to mouse clicks. But after a few days running, random some of those icons (not all of them) became blank spaces, and not responding to any mouse click. Just like the below screenshot:Those apps can be found on Task Manager, and they are still functional.Q: What are the possible reasons for this? Anything I should be aware of on Event Viewer? What can I do to avoid this?Thanks

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