Electrumx won't start because UTXO not found in "h" table, but it's a confirmed tx

Most probably related #265 , after that ElectrumX cannot be started any more. Updated to latest git master and still the same. Here is the complete traceback:

ERROR:electrumx:ElectrumX server terminated abnormally
Traceback (most recent call last):
  File "/usr/local/bin/electrumx_server", line 35, in main
    asyncio.run(controller.run())
  File "/usr/lib/python3.9/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/usr/lib/python3.9/asyncio/base_events.py", line 642, in run_until_complete
    return future.result()
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/lib/server_base.py", line 129, in run
    await server_task
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/lib/server_base.py", line 102, in serve
    await self.serve(shutdown_event)
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/controller.py", line 134, in serve
    await group.spawn(wait_for_catchup())
  File "/home/ss/.local/lib/python3.9/site-packages/aiorpcx/curio.py", line 297, in __aexit__
    await self.join()
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/lib/util.py", line 377, in join
    raise exc
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 702, in fetch_and_process_blocks
    await group.spawn(self._process_prefetched_blocks())
  File "/home/ss/.local/lib/python3.9/site-packages/aiorpcx/curio.py", line 297, in __aexit__
    await self.join()
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/lib/util.py", line 377, in join
    raise exc
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 663, in _process_prefetched_blocks
    await self.check_and_advance_blocks(blocks)
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 229, in check_and_advance_blocks
    await self.run_in_thread_with_lock(self.advance_blocks, blocks)
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 212, in run_in_thread_with_lock
    return await asyncio.shield(run_in_thread_locked())
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 211, in run_in_thread_locked
    return await run_in_thread(func, *args)
  File "/home/ss/.local/lib/python3.9/site-packages/aiorpcx/curio.py", line 57, in run_in_thread
    return await get_event_loop().run_in_executor(None, func, *args)
  File "/usr/lib/python3.9/concurrent/futures/thread.py", line 52, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 409, in advance_blocks
    undo_info = self.advance_txs(block.transactions, is_unspendable)
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 450, in advance_txs
    cache_value = spend_utxo(txin.prev_hash, txin.prev_idx)
  File "/home/ss/.local/lib/python3.9/site-packages/electrumx/server/block_processor.py", line 646, in spend_utxo
    raise ChainError(f'UTXO {hash_to_hex_str(tx_hash)} / {tx_idx:,d} not '
electrumx.server.block_processor.ChainError: UTXO 70900883bd3d29998f22c345d7d42728386e37eae8792ddec34e41c9102782a4 / 14 not found in "h" table
Traceback (most recent call last):
  File "/usr/local/bin/electrumx_rpc", line 4, in <module>
    __import__('pkg_resources').run_script('e-x==1.16.0', 'electrumx_rpc')
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 651, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1436, in run_script
    raise ResolutionError(
pkg_resources.ResolutionError: Script 'scripts/electrumx_rpc' not found in metadata at '/home/ss/.local/lib/python3.9/site-packages/e_x-1.16.0.dist-info'
Control process exited, code=exited, status=1/FAILURE
Failed with result 'exit-code'.
Consumed 46.134s CPU time.

Start with electrumx/server/block_processor.py, especially advance_txs() and spend_utxo(), where the traceback reports the missing UTXO in the "h" table. Read related issue #265 and trace why the confirmed transaction is absent during block processing. Done means the server can start and process this transaction without raising the ChainError.