Zero cost basis for stETH reward import via CSV

Today I imported my staking rewards for stETH using the CSV import feature.

The latest 5 or so rewards have a cost basis, but then ALL of the others have a ZERO cost basis.

Why is this? How do I fix this? Why is CoinTracker not calculating this automatically?

(On a side note, I am paying for both a subscription AND the tax plan, but support won’t respond to any of my tickets).