Server2 unidirecctional IO test failure (on darwin machines)

```
Ouroboros.Network
Server2
unidirectional IO: FAIL (54.87s)
*** Failed! Falsified (after 57 tests and 4 shrinks):
ClientAndServerData {accumulatorInit = 0, hotInitiatorRequests = [[73,8]], warmInitiatorRequests = [[-18,-28,-89]], establishedInitiatorRequests = [[-58]]}
MuxError (MuxShutdown (Just MuxBearerClosed)) " closed when reading data, waiting on next header True"
Use --quickcheck-replay=896988 to reproduce.
Use -p '/unidirectional IO/' to rerun this test only.
```

Ref: https://github.com/input-output-hk/ouroboros-network/pull/4717/checks?check_run_id=18936248276