I bought stock A on Aug 31 and sold it on Sep 15 to have a gain. I bought it again on Sep 30 and sold it on Oct 15 for a loss. Is this loss disallowed due to wash sale?

how about the opposite situation? Bought A on Aug 31 and sold it on Sep 15 to have a loss. Then bought it again on Sep 30 and sold it on Oct 15 for a gain. Is this loss disallowed due to wash sale? Thank you so much for your explanation.