Junos OS introduced a new mechanism to maintain multicast traffic order and resolve packet drop issue. Use the strict-packet-order command at the [edit security flow] hierarchy level to maintain the packet order.
As part of this enhancement, you can configure the multicast route next-hop resolve attempts. When a multicast route next-hop resolve is unsuccessful, device attempts to resolve the next-hop route based on the specified retry counts. Use the multicast-nh-resolve-retry command at the [edit security flow] hierarchy level to specify the number of retry counts.