DWG Closing Popup "auto-canceled"

Hi all,
I need help with a persisting issue with this popup (attached screenshot) when want to close a CAD drawing with no intention of saving it. The popup is closed by itself so quick in a second after I click the "close" button. doesn't give me time to click "yes" or "no". it kinda like having something pressing ESC to cancel it immediately. changed new keyboard. also already did clean reinstallation including deleting appdata - roaming - bricsys folder after uninstalled. reinstalled v26. the issue still persisting. So, no clue what causing it. Didn't add any new lisp lately too.
Does anyone have any solution? thank you very much in advance. The screenshot is taken from other office PC's bricscad which running finely btw.

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