An XDA contributor has noticed that Google Maps has gained the ability to scan a mobile device's clipboard for addresses. This enables it to suggest an address that has been copied from, say, Chrome, in its search bar without the need for a button or option to paste it. It is not clear when this new feature of Maps arose.
https://www.notebookcheck.net/Google-Maps-now-auto-completes-addresses-from-a-browser-s-clipboard-no-paste-needed.418143.0.html