Hi, a small question: do you have in Credentials list also the credentials with full access or did you remove them? It's necessary to keep just credentials with limited access.
It's also possible that although the clusters are present, they are becoming Stale and Decommisioned within one or two days. So after two days they should disappear. Is this your case?
If none of above hints help you please contact SolarWinds support.
I have removed all other credentials.
And no they haven't disappeared after a couple days.
I will open a case with support.