F800GS - noise from clutch when pulling away

Hi Everybody, just checking whether anybody has experienced this before and what I could possibly check? Since the last few rides my 800 has been making a noise when pulling away which sounds like the chain slipping on the sprocket. The chain and sprockets are still fine, so it must me coming from the clutch. It's mostly evident when I pull away on a slight incline and gets worse when I pull away a bit harder. It goes away in a second or two and doesn't happen when I go from 1st to 2nd and onwards. So only at pull away.

BMW did replace the clutch about 1500 km ago due to sticky plates.

Cheers
Christo