Stacks Blockchain + Hiro API Genesis Sync gets stuck after a while

Core Blockchain
#1

I am testing the Umbrel Stacks Node setup from: https://github.com/muthusleuths/stacks-on-umbrel

It started really good but then the Stacks blockchain got stuck at block 556585 for a while (per the /v2/info endpoint).
image
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Looking at the Hiro API it seems like it was progressing further than that block (per the /extended endpoint). But after a few hours the Hiro API also got stuck at block 638772.

Has anyone run into this situation ? Now it has been over 24 hours and multiple restarts. The APIs are still reporting the same.

The postgres database shows the API definitely stopped at block 638772.
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The one thing I am seeing is odd is at block 638772 the events_observer_requests that was received has 0 events. It’s an empty array. Could this be the cause.
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Seems hours later another /new_block was received also with 0 events and it looks rather odd

{
  "events": [],
  "block_hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "block_time": null,
  "miner_txid": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "reward_set": null,
  "block_height": 0,
  "cycle_number": null,
  "transactions": [],
  "anchored_cost": {
    "runtime": 0,
    "read_count": 0,
    "read_length": 0,
    "write_count": 0,
    "write_length": 0
  },
  "signer_bitvec": null,
  "tenure_height": 0,
  "consensus_hash": "0x0000000000000000000000000000000000000000",
  "burn_block_hash": "0x0000000000000000000ab248c8e35c574514d052a83dbc12669e19bc43df486e",
  "burn_block_time": 1610643248,
  "index_block_hash": "0x55c9861be5cff984a20ce6d99d4aa65941412889bdc665094136429b84f8c2ee",
  "burn_block_height": 666050,
  "parent_block_hash": "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
  "parent_microblock": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "pox_v1_unlock_height": 781552,
  "pox_v2_unlock_height": 787652,
  "pox_v3_unlock_height": 840361,
  "matured_miner_rewards": [],
  "parent_burn_block_hash": "0x0000000000000000000ab248c8e35c574514d052a83dbc12669e19bc43df486e",
  "parent_index_block_hash": "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
  "parent_burn_block_height": 666050,
  "confirmed_microblocks_cost": {
    "runtime": 0,
    "read_count": 0,
    "read_length": 0,
    "write_count": 0,
    "write_length": 0
  },
  "parent_microblock_sequence": 0,
  "parent_burn_block_timestamp": 1610643248
}
#2

Just to update. I uninstalled the Stacks node in my Umbrel and started over and this time the blockchain stopped at block 490,681 and the Hiro API stopped at block 560,652

So definitely not a fluke.

Would appreciate any help. Just give me ideas for where to poke around.

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