Melt result state PAID while related lightning payment FAILED

[minibits-cash]

I had a long time stuck melt-related lightning payment in IN_FLIGHT status. In spite of the fact that related expiration block heights expired, it did not clear up until I restarted the lnd node. After that, IN_FLIGHT htlc-s were resolved and payment finally timed-out:

{ "payment_hash": "22e9e1334ee66feceed667fcc10d1db60100b059b8bdfb91beacd4aef4d7dace", "value": "****", "creation_date": "1725151366", "fee": "0", "payment_preimage": "0000000000000000000000000000000000000000000000000000000000000000", "value_sat": "****", "value_msat": "****000", "payment_request": "******", "status": "FAILED", "fee_sat": "0", "fee_msat": "0", "creation_time_ns": "1725151366317091263", "htlcs": [], "payment_index": "****", "failure_reason": "FAILURE_REASON_TIMEOUT" },

However when I checked related meltquote I found, that Nutshell turned the melt quote state to PAID - this is an issue.

I checked the nutshell logs and at that time I found the line, where fee matched the fee_reserve of the payment:

Sep 08 20:30:05 nutshell poetry[2793]: 2024-09-08 20:30:05.23 | DEBUG | cashu.mint.ledger:melt:920 | Melt – Ok: True: preimage: 0000000000000000000000000000000000000000000000000000000000000000, fee: **** msat

I use LNBits as a funding source, here are related LNbits logs just after the restart:

lnbits poetry[80066]: 2024-09-08 20:30:04.85 | WARNING | didn't receive checking_id from backend, payment may be stuck in database: 22e9e1334ee66feceed667fcc10d1db60100b059b8bdfb91b

lnbits poetry[80066]: 2024-09-08 20:30:05.22 | INFO | 10.7.1.229:34856 - "GET /api/v1/payments/22e9e1334ee66feceed667fcc10d1db60100b059b8bdfb91beacd4aef4d7dace HTTP/1.1" 200

lnbits poetry[80066]: 2024-09-08 20:39:27.55 | WARNING | Deleting outgoing failed payment 22e9e1334ee66feceed667fcc10d1db60100b059b8bdfb91beacd4aef4d7dace: failed