macOS Sequoia and keystroke

AppleScript
#1

I have a script using cmd-C and cmd-N keystroke commands. It worked fine for several weeks!
Now, after upgrading my mac to Sequoia it stops working. To be more precise, the “keystroke “c” using {command down}” does no longer set the clipboard content.

Any idea?

#2

This works for me on macOS 15.1 beta5 + SD 8.0.9

use AppleScript version "2.4" -- Yosemite (10.10) or later
use framework "Foundation"
use scripting additions

tell application "Safari" to activate

tell application "System Events"
	tell process "Safari"
		keystroke "n" using {command down}
	end tell
end tell