Validator Payout Issue After Polkadot v1.4.0 Upgrade: AlreadyClaimed Error

[ayushmishra2005]

• I'm submitting a ...

  • Bug report
  • Feature request
  • Support request
  • Other

After upgrading my chain to Polkadot v1.4.0, one of my validators has started reporting a strange issue related to payouts:
Validator Issue:

• The validator still shows up as needing to be paid out in the payouts section.

• When we manually trigger the payout using staking.payoutStakers, it throws the error AlreadyClaimed.

• On the targets tab, the validator does not appear under recently claimed.

• What is the current behavior and expected behavior?

Current Behaviour:

• The validator still shows up as needing to be paid out in the payouts section.

• When we manually trigger the payout using staking.payoutStakers, it throws the error AlreadyClaimed.

• On the targets tab, the validator does not appear under recently claimed.

Expected Behaviour:

If validator is paid, it should not be shown in the payout section and should appear under Staking>>Targets section.

Observation:
I tested this for a specific validator and era:

1. Checked the validator’s free balance before triggering the payout:
2. Manually triggered staking.payoutStakers for the specified era.
3. Checked the validator’s free balance again after the payout:

The difference matched the expected reward amount, confirming that the payout was processed successfully on-chain.

Steps Taken So Far:

1. Verified reward points and staking details for the validator.
   • Validator actively participated in the specified era, with reward points and stake details consistent with expectations.
2. Checked for pending payouts:
   • Validator is still showing as needing a payout.

• This issue started immediately after upgrading the chain to Polkadot v1.4.0.

• I suspect this might be related to either a change in payout logic introduced in the new version or a UI-related issue with PolkadotJS Apps.