The connection timed out occasionally on the web side in our production environment

[gangchzu]

Describe the bug
We run python-socketio server with tornado，occasionally，the connection timed out on the web side in our production environment，but the test environment cannot reproduce.
On the web side logs show that it cannot receive the open event of the server after the client is connected, and continues to try to initiate a connection after a 20s timeout， On the server side logs show that client is connected successfully，could you please give me some ideas?

the connection is based on websocket，not polling

server side logs:
884b05179ecc4592ba2e208020926b66: Sending packet OPEN data {'sid': '884b05179ecc4592ba2e208020926b66', 'upgrades': [], 'pingTimeout': 60000, 'pingInterval': 25000}
884b05179ecc4592ba2e208020926b66 is entering room xxx [/]
884b05179ecc4592ba2e208020926b66: Sending packet MESSAGE data 0
884b05179ecc4592ba2e208020926b66: Received request to upgrade to websocket
884b05179ecc4592ba2e208020926b66: Upgrade to websocket successful

python-socketio version is 4.6.1
python-engineio version is 3.14.2