Is there anyone experiencing a clicking sound when turning the steering wheel fully or going down a step? Is this a common issue?

Check the front axle assembly. I bought it in 2018, and the 4S shop has replaced it three times already. It's puzzling, and I'm starting to wonder if it's a common issue.

When the steering wheel is turned all the way, sometimes there is a noise, but there's no obvious abnormal sound when going down a step. In your case, it is very likely caused by an issue with the stabilizer bar or suspension.