Illustrator Spacebar malfunction

It's either Sonoma casuing this. Or you have a third party app interfering. 

One of these (but not limited to them)

• WebRoot
• Apple Terminal
• Word, Excel, Powerpoint
• »Enable Full Keyboard« in Settings > Accessibility > Keyboard on Mac OS
• Apple Mail, Outlook
• Spacebar is used as a shortcut by the system
• Chrome, Internet Explorer, Safari
• Wacom Desktop Center, Wacom settings
• Windows Touch Pad problem
• LastPass, Bitwarden (password managers)
• The VPN
• LangSwitcher app (it needs to be closed and disabled)