id summary reporter owner description type status milestone component version severity resolution keywords cc 3826 Background not erased for label with $GUI_BKCOLOR_TRANSPARENT set KaFu "Does not happen with autoit-v3.3.15.0-beta-setup.exe, first occurred with autoit-v3.3.15.1-beta-setup.exe https://www.autoitscript.com/forum/topic/202668-autoit-v33151-beta Checked release notes and guess it might be related to this fix: - Fixed: Workarounds added to alleviate slow downs on Windows 10 1809 and later (OS bug/design change). To test comment / un-comment the GUI_BKCOLOR_TRANSPARENT line and run with prod version and current Beta. With current Beta the updated data overwrites the label with erasing to old data first. #include Opt(""GUIOnEventMode"", 1) GUICreate(""Test"", 550, 40) GUISetOnEvent($GUI_EVENT_CLOSE, ""_Exit"") $c_Label = GUICtrlCreateLabel(TimerInit, 10, 10, 430, 20) GUICtrlSetBkColor(-1, $GUI_BKCOLOR_TRANSPARENT) ; comment / un-comment this line ; does not happen with autoit-v3.3.15.0-beta-setup.exe, first occurred with autoit-v3.3.15.1-beta-setup.exe ; https://www.autoitscript.com/forum/topic/202668-autoit-v33151-beta ; checked release notes and guess it might be related to this fix: ; - Fixed: Workarounds added to alleviate slow downs on Windows 10 1809 and later (OS bug/design change). GUICtrlCreateButton('Exit', 495, 10, 50) GUICtrlSetOnEvent(-1, ""_Exit"") GUISetState() While 1 GUICtrlSetData($c_Label, TimerInit()) WEnd Func _Exit() Exit EndFunc ;==>_Exit" Bug new AutoIt 3.3.15.4 None