[BUG] Faild fetch Block add Sync node full overload.

Describe the bug I looked at the log and saw an error like this appearing many times.

2021-05-04T15:10:43.440 full_node full_node_server        : ERROR    Exception: Failed to fetch block 228631 from None, timed out, None. Traceback (most recent call last):
  File "chia\server\server.py", line 521, in wrapped_coroutine
  File "chia\full_node\full_node_api.py", line 104, in new_peak
  File "chia\full_node\full_node.py", line 361, in new_peak
  File "chia\full_node\full_node.py", line 310, in short_sync_backtrack
  File "chia\full_node\full_node.py", line 295, in short_sync_backtrack
ValueError: Failed to fetch block 228631 from None, timed out

2021-05-04T15:10:43.456 full_node full_node_server        : ERROR    Exception: Failed to fetch block 228631 from None, timed out <class 'ValueError'>, closing connection None. Traceback (most recent call last):
  File "chia\server\server.py", line 531, in api_call
  File "asyncio\tasks.py", line 414, in wait_for
  File "chia\server\server.py", line 528, in wrapped_coroutine
  File "chia\server\server.py", line 521, in wrapped_coroutine
  File "chia\full_node\full_node_api.py", line 104, in new_peak
  File "chia\full_node\full_node.py", line 361, in new_peak
  File "chia\full_node\full_node.py", line 310, in short_sync_backtrack
  File "chia\full_node\full_node.py", line 295, in short_sync_backtrack
ValueError: Failed to fetch block 228631 from None, timed out

My Full node is frequently overloaded asynchronously. If I don’t open port 8444 everything is fine. If I open this port. There are over 55 Full nodes connected to my node and they frequently change node addresses. I see the log to see error not connect node, reconect node. Each time like this, about 1 to 2 hours is repeated once. Each time, it takes about 10 to 15 minutes to sync again. If I run the command chia.exe start node -r then the problem gets fixed.

2021-05-04T15:38:10.190 full_node chia.full_node.full_node: ERROR Respond peers exception: . Traceback: Traceback (most recent call last): File "chia\server\node_discovery.py", line 507, in respond_peers File "chia\server\node_discovery.py", line 397, in _respond_peers_common File "chia\server\address_manager.py", line 602, in add_to_new_table File "asyncio\locks.py", line 92, in __aenter__ File "asyncio\locks.py", line 192, in acquire concurrent.futures._base.CancelledError

Desktop (please complete the following information):

• OS: Windows Server 2019
• RAM: 64GB,
• CPU: [e.g. Intel Xeon E5 2670]

[JakeShirley]

Having these errors spew on my Unraid farmer on 1.1.6.dev0.

[njtnestor]

I have same issue with v 1.4 too