Does this sentence make sense?

I was talking to a friend about visiting her place and she ended the convo with: Välkommen när du kommer

I asked her if she meant: du är välkommen att komma or välkommen återkommer

She said no she meant: Du är välkommen (att komma) när du kommer...

We both have swedish as are second language so I am in no mind to correct but the sentence feels so off aside from the fact that I still don’t understand what she means.

Am I wrong here?