Understanding Zero Reward Epochs in NEAR Staking Analysis

The individual is attempting to display the rewards received by a near delegator who has staked tokens with a validator. Since there isn't a direct method to retrieve the rewards, they analyze the stake balance changes between epoch start and end, adjusting for staking actions. However, they notice that in some epochs, despite the validator being active, there are no apparent rewards recorded. They are cross-checking these findings with the nearscope net dashboard, which reports stake balance changes without corresponding actions. The dashboard suggests these changes might represent rewards accrued, yet it shows zero rewards for certain epochs. They seek help to understand this discrepancy.