Lights offline after pairing with Light Link switch

Hello,

I have different lights which all worked fine in the beginning.
Then I paired them via Light Link with a switch. I am now able to control the lights with the physical switch, but the lights appear offline in the SmartThings app.

I reset the lights, added them again to SmartThings. It was working again. After pairing it with the Light-Link switch, they appear offline again.

Anyway to resolve that issue or to find out if the issue is caused by the LightLink switch or by SmartThings?

Thanks!

What brand are you talking about?