Side Scrolling Not Working in Sims Legacy

Dear EA/all, I've just downloaded The Sims Legacy for the second time and to my delight, the UI scaling issue has been fixed!! However, as soon as I started to play, I noticed that I can't scroll from side to side with my cursor whenever I'm on a lot - whether it's empty or occupied. Strangely I can move up and down, but not left to right. So the only way to view something either side of my current screen is to zoom out. Has anyone else experienced this bug? I'm using Windows 11.