Compare Quantus local sync height with the network
A progressing network does not establish that your local node is synchronized. The explorer shows the network view; local node status or logs show your own progress. Both records must refer to the same mainnet.
What to check
Record block height, hash and observation time on both sides, and verify mainnet rather than retired Planck. A shrinking gap suggests progress worth observing. Similar heights with different network identities require a configuration check before interpreting mining results. A network chart alone does not justify reinstalling a wallet.
Example
Example: explorer height 1000 and local height 900 show a local gap at observation time. The missing 100 heights are not 100 personal rewards. Reconcile actual rewards separately using the reward address and its records.