QMP command hangs after lost SSH connection

In scenarios with limited resources (leading to QEMU poor performance), scp fails with "lost connection", which seems to cause the QMP command to hang:

INFO         StepLogger:  → SSHDriver.put(filename='/data_sda/aleter01/cache/bazel/sandbox/linux-sandbox/2/execroot/_main/bazel-out/k8-fastbuild-ST-357fcab58d2a/bin/qemu/test-arm64.runfiles' remotepath='/tmp/tmp.FavzsAYy7s/execroot/inner.runfiles') 
lost connection
INFO         StepLogger:  ⚠ SSHDriver.put() [66.538s] exception=error executing command: ['scp', '-o', 'LogLevel=ERROR', '-F', 'none', '-o', 'ControlPath=/tmp/lg-ssh-cq7zbd1x/control-localhost', '-P', '2223', '-r', '/data_sda/aleter01/cache/bazel/sandbox/linux-sandbox/2/execroot/_main/bazel-out/k8-fastbuild-ST-357fcab58d2a/bin/qemu/test-arm64.runfiles', 'labgrid-user@localhost:/tmp/tmp.FavzsAYy7s/execroot/inner.runfiles']
INFO         StepLogger:  → SSHDriver.run(cmd='/tmp/tmp.FavzsAYy7s/rm -rf /tmp/tmp.FavzsAYy7s') 
INFO         StepLogger:  ⚠ SSHDriver.run()  exception=Keepalive no longer running
INFO         StepLogger:  → QEMUStrategy.transition() 
INFO         StepLogger:   → QEMUDriver.off() 
INFO         StepLogger:    → QEMUDriver.monitor_command(command='quit' arguments={}) 
DEBUG   QMPMonitor(moni:     Received line: {"timestamp": {"seconds": 1732874120, "microseconds": 930276}, "event": "RTC_CHANGE", "data": {"offset": 1, "qom-path": "/machine/unattached/device[4]"}}