Use previous start height if latest start height is not available
Use previous start height if latest start height is not available

ayeowch/bitnodes,jmaurice/bitnodes,jmaurice/bitnodes,Pan0ram1x/bitnodes,ayeowch/bitnodes,NiKiZe/bitnodes,NiKiZe/bitnodes,Pan0ram1x/bitnodes