So I synced Fulcrum from scratch and now it's stuck like this (for three hours now):
[2025-01-27 00:42:51.127] <Controller> Processed height: 606000, 68.8%, 18.0 blocks/sec, 38790.7 txs/sec, 136442.5 addrs/sec
[2025-01-27 00:42:51.637] <Controller> Processed 606011 new blocks with 479411650 txs (1178064770 inputs, 1278776241 outputs, 1810346733 addresses), verified ok.
[2025-01-27 00:42:51.637] <Controller> Initial sync ended, flushing and deleting UTXO Cache ...
[2025-01-27 00:42:51.637] <Controller> Storage UTXO Cache: Flushing to DB ...
Looking at the task manager it's not using disk space apparently, and just some memory (RAM) so I think it's safe to stay it's not doing anything? Also the
Processed height: 606000, 68.8% makes me think that Fulcrum is aware that my Bitcoin node was stopped at a specific block height that's missing a lot of recent blocks. Not sure what to do with this thing now really, I'd be happy to have it work correctly with up toblock height 606,010 (which is where I have turned connect=0 for my node), but I don't know if that's doable.
You need to wait for flushing to finish. Painful and long, but it will pass. [1]