When you unstake on Coinbase, CoinTracker records the unstake on the date you requested it, not the date Coinbase releases the funds. The locked assets are treated as available early and can be matched to sales made before they were released. Realized gains and remaining cost basis then won't match Coinbase.

Customers who connect Coinbase by API, unstake an asset, and sell the same asset before the unstake completes.

You can upvote this forum post to indicate you are experiencing this behavior. The post status will be changed to once a fix is rolled out to all users. Up-voters will be notified of the status change.