Safari - Command+1 shortcut not working
Recently discovered that you can use Command+(number) to switch between tabs easily in Safari. Although Command+2 through to 9 work, Command+1 doesn't.. Any ideas?
I've checked that Command+1 hasn't been used as a shortcut anywhere else in system preferences, and it hasn't.
I have cleared all cache and history in Safari, as well as closing application & restarting my Mac.
Any help is much appreciated.
MacBook Pro 13″, macOS 12.2