Preferences UI elements missing na… | Apple Developer Forums

Preferences UI elements missing names in Big Sur

I have an AppleScript which sets my preferences, in this case for Finder. Prior to Big Sur, I was able to select a checkbox to toggle with the following:

Code Block tell checkbox "Recents" to if value is 1 then click

Code Block
tell checkbox "Recents" to if value is 1 then click

However, in Big Sur, the name property of these particular checkboxes appears to be missing. The following script run with Script Editor shows the difference:

Code Block tell application "Finder"
	activate
	delay 1
end tell
tell application "System Events"
	tell process "Finder"
		keystroke "," using {command down}
		delay 1
		tell window "Finder Preferences"
			click button "Sidebar" of toolbar 1
			delay 0.5
			tell checkbox 1
				get properties
			end tell
		end tell
	end tell
end tell

Code Block
tell application "Finder"
activate
delay 1
end tell

tell application "System Events"
tell process "Finder"
keystroke "," using {command down}
delay 1

tell window "Finder Preferences"
click button "Sidebar" of toolbar 1
delay 0.5

tell checkbox 1
get properties
end tell
end tell
end tell
end tell

Prior to Big Sur, the results are:

Code Block {minimum value:missing value, orientation:missing value, position:{47, 943}, class:checkbox, accessibility description:missing value, role description:"checkbox", focused:false, title:"Recents", size:{297, 18}, help:missing value, entire contents:{}, enabled:true, maximum value:missing value, role:"AXCheckBox", value:0, subrole:missing value, selected:missing value, name:"Recents", description:"checkbox"}

Code Block
{minimum value:missing value, orientation:missing value, position:{47, 943}, class:checkbox, accessibility description:missing value, role description:"checkbox", focused:false, title:"Recents", size:{297, 18}, help:missing value, entire contents:{}, enabled:true, maximum value:missing value, role:"AXCheckBox", value:0, subrole:missing value, selected:missing value, name:"Recents", description:"checkbox"}

But on Big Sur (at least on the M1 MBP I have access to with Big Sur), the results are:

Code Block {minimum value:missing value, orientation:missing value, position:{705, 234}, class:checkbox, accessibility description:"Recents", role description:"checkbox", focused:false, title:"", size:{14, 16}, help:missing value, entire contents:{}, enabled:true, maximum value:missing value, role:"AXCheckBox", value:1, subrole:missing value, selected:missing value, name:missing value, description:"Recents"}

Code Block
{minimum value:missing value, orientation:missing value, position:{705, 234}, class:checkbox, accessibility description:"Recents", role description:"checkbox", focused:false, title:"", size:{14, 16}, help:missing value, entire contents:{}, enabled:true, maximum value:missing value, role:"AXCheckBox", value:1, subrole:missing value, selected:missing value, name:missing value, description:"Recents"}

You can see the name property on Big Sur is missing. Is this a bug? Some other preferences scripts I have appear to still work using the element names to interact with the UI, though I have not tested them all.