Why does syncing a Kaspa node sometimes repeat its final stages?

After the main sync finishes, a Kaspa node often needs to run its last few stages a second (or third) time to catch up on blocks that arrived while it was syncing. Because the Kaspa DAG keeps growing the entire time your node is downloading history, by the time the first sync pass ends there is a fresh batch of new data — typically representing 20 minutes to 2 hours of recent blocks — waiting to be processed. The node then repeats the final three stages to handle that backlog, and may do so once more depending on how fast your CPU and how much RAM your machine has. For a beginner, this means the progress bar reaching 100% is not necessarily the finish line; give the node a little extra time to complete these catch-up passes before treating it as fully synced.