Wireless keyboard Home and End Keys Assignement

Hi

For some reason, after updating MacOS, my wireless keyboard with numeric keypad has suddenly changed the behaviour of the Home and End keys. When working on documents, they would go to the beginning or the end of the line I'm typing. Now it goes to the top or bottom of the page. I've tried resetting the keyboard and re-connecting it to the computer, resetting the keyboard, but no luck.

Any ideas? It's very annoying.

Cheers.