Workaround the HDR bug of macOS Catalina 10.15.4

ToggleHDRCatalina.applescript

tell application "System Preferences"
	activate
end tell

tell application "System Events"
	tell process "System Preferences"
		activate
		delay 1
		click menu item "Displays" of menu "View" of menu bar 1
		delay 1
		tell window "LG HDR 4K"
			delay 1
			if (exists tab group 1) then
				click radio button "Display" of tab group 1
				if (exists checkbox "High Dynamic Range" of tab group 1) then
					click checkbox "High Dynamic Range" of tab group 1
					delay 5
					click checkbox "High Dynamic Range" of tab group 1
				end if
			end if
		end tell
	end tell
end tell