Coin transactions on Polygon (MATIC) are not being automatically matched against their main-chain counterparts. This happens only on public wallet addresses. We map automatically on exchanges and when transactions are imported via the generic CoinTracker CSV format.
When tokens are not automatically mapped, users will see a question mark or a the first letter of the coin's symbol inside of a blue circle instead of the correct symbol for the coin.
One workaround for this is to edit the affected transactions in the public wallet and manually select the correct coin. Please see the following article on our help center for further details: https://help.cointracker.io/en/articles/5158413-why-are-my-transactions-showing-the-wrong-coin
If you have a very large number of transactions, you may want to use the CoinTracker generic CSV format to add the wallet instead of using the public address. The CSV import will allow the coins to be mapped automatically so you won't need to select them by manually. Once you obtain the CSV of your transactions, follow these instructions to create the import: https://support.cointracker.io/hc/en-us/articles/4413071299729