Core rejected expired HTLC claim as too soon

[TheBlueMatt]

Just saw my sample node try to broadcast an expired HTLC claim on-chain but it got rejected for a locktime failure. The transaction's locktime was one higher than the block height being connected, which it got from the same bitcoind, so it should have made it into the mempool. I wonder if there's some bug in core or race condition there where the mempool hasn't been updated yet? It seemed to only get broadcasted an hour (and a number of blocks) later when I did it manually (but I assume we'd have rebroadcasted it again after some number of blocks? I hope?).

[TheBlueMatt]

cc @wpaulino any ideas here? Kinda weird it didn't seem to reconnect.

Relevant logs (note that the tx was broadcasted only after around 785162).

2023-04-13 02:02:22.558 TRACE [lightning::chain::channelmonitor:3079] Processing 0 matched transactions for block at height 785156.
2023-04-13 02:02:22.558 DEBUG [lightning::chain::onchaintx:612] Updating claims view at height 785156 with 0 claim requests
2023-04-13 02:02:22.558 TRACE [lightning::chain::onchaintx:658] Restoring delayed claim of package(s) at their timelock at 785157.
2023-04-13 02:02:22.558 DEBUG [lightning::chain::package:712] Adding claiming input for outpoint 627f9c012df76f3f8716e587855b299cdf8cd99a6345ebf53604139abe32b159:1
2023-04-13 02:02:22.558 DEBUG [lightning::chain::package:713] Finalized transaction 434f4c8ed77b2ab2927a6c75f6dfbb9aeb2de58943d4cb919c792762a194e3a8 ready to broadcast
2023-04-13 02:02:22.558 INFO  [lightning::chain::onchaintx:671] Broadcasting onchain HTLC-timeout tx with txid 434f4c8ed77b2ab2927a6c75f6dfbb9aeb2de58943d4cb919c792762a194e3a8
2023-04-13 02:02:22.558 INFO  [lightning::chain::onchaintx:697] Registering claiming request for 627f9c012df76f3f8716e587855b299cdf8cd99a6345ebf53604139abe32b159:1
2023-04-13 02:02:22.558 DEBUG [lightning::chain::onchaintx:721] Updating claims view at height 785156 with 0 matched transactions in block 785156
2023-04-13 02:02:22.558 TRACE [lightning::chain::onchaintx:838] Bumping 0 candidates