channel force closed by remote right after we send update_fee

[ecdsa]

I had another channel force closed, this time by Eclair.

20241028T004618.683275Z |     INFO | network | fee_estimates {25: 1838, 10: 2245, 5: 2245, 2: 2245}
20241028T004618.683635Z |     INFO | lnpeer.Peer.[LNWallet, 03ecef675b-8b53960d] | (866361x3267x2) onchain fees have changed considerably. updating fee.
20241028T004618.683717Z |     INFO | lnpeer.Peer.[LNWallet, 03ecef675b-8b53960d] | (chan: 866361x3267x2) current pending feerate 18749. new feerate 561
20241028T004618.683946Z |    DEBUG | lnpeer.Peer.[LNWallet, 03ecef675b-8b53960d] | Sending UPDATE_FEE

Here is the eclair log line:

2024-10-28 00:46:18,684 ERROR f.a.e.c.fsm.Channel n:033b474b547fe003f213a36eabaf0d793a8e8205778ea5f80cf7086defc115a6f7 c:0873032fcb3a384616363fa2436a1ded978a6a9a1d94e7b62a089e10f80adc25 - local/remote feerates are too different: remoteFeeratePerKw=561 localFeeratePerKw=15584 while processing msg=UpdateFee in state=NORMAL

These are the previous fee estimates in the log. Quite an abrupt change.

20241027T235314.651848Z |     INFO | network | fee_estimates {25: 1838, 10: 2245, 5: 2245, 2: 62339}
20241027T235915.029834Z |     INFO | network | fee_estimates {25: 1838, 10: 2245, 5: 2245, 2: 62341}
20241028T004618.683275Z |     INFO | network | fee_estimates {25: 1838, 10: 2245, 5: 2245, 2: 2245}
20241028T025933.031630Z |     INFO | network | fee_estimates {25: 1836, 10: 2245, 5: 2245, 2: 2245}

No auto-connect, Electrum was using ecdsa.net as server.