Add device to already join wifi device

Hi there,

I just got my first Smartthings device (Samsung washer) and it joined smoothly.
After a firmware update the washer was showed as offline all the time so I decided to delete it in my app.

Now I wanted to add the device again and the only option is to add it as a new washer including wifi setup and so on. The washer is already connected to the wifi but the app want’s me to connect to it as it not wifi connected.

Is this normal or am I doing it wrong?

Over all it seems like the Smartthing app is very poor.