Submit extrinsic with wait_for_finalization flag set never returns if called by asyncio.to_thread

[khssnv]

SubstrateInterface.submit_extrinsic with wait_for_finalization flag set never returns if called by asyncio.to_thread.

Example

receipt = await asyncio.to_thread(
    substrate.submit_extrinsic,
    extrinsic,
    wait_for_inclusion=True,
    wait_for_finalization=True,
)
print("not reachable")

Environment

$ pip show substrate-interface 
Name: substrate-interface
Version: 1.2.0
$ python -V
Python 3.9.10
$ uname -a
Linux e14 5.13.0-28-generic #31~20.04.1-Ubuntu SMP Wed Jan 19 14:08:10 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

Connection: websocket

[khssnv]

I tried to debug and can't reproduce the issue now. I will reopen it later if I can reproduce the problem.