Interesting cloudscape and terrain! Welcome to the forums! Glad to see a new user! If you ever need any help, or have general questions, don't hesitate to ask. We're all very helpful here.
Are you by chance using my overcast shares for the cloud bases? If you are, they are sort designed to mask where the sun actually is (spreading out the lit area in the clouds) so if you are, it may mask where the stars are.