Comment 3 for bug 1949893

Fwiw, I'm trying to find a reproducer via something like:
"""
path=$(dbus-send --system --print-reply --type=method_call --dest=io.netplan.Netplan /io/netplan/Netplan io.netplan.Netplan.Config|grep path|cut -f2 -d'"')

dbus-send --system --print-reply --type=method_call --dest=io.netplan.Netplan "$path" io.netplan.Netplan.Config.Set string:"network.bridges.br54.dhcp4=true" string:"90-snapd-conf"
dbus-send --system --print-reply --type=method_call --dest=io.netplan.Netplan "$path" io.netplan.Netplan.Config.Try uint32:30
sleep 0.1
dbus-send --system --print-reply --type=method_call --dest=io.netplan.Netplan "$path" io.netplan.Netplan.Config.Apply

ip link | grep br54
"""

Unfortunately I'm not successful so far, the above code for example fails with:
"""
            + dbus-send --system --print-reply --type=method_call --dest=io.netplan.Netplan /io/netplan/Netplan/config/RDMLC1 io.netplan.Netplan.Config.Apply
Error org.freedesktop.DBus.Error.Failed: netplan try failed: Child process killed by signal 10
"""

But if I increase the sleep things work just fine. So no luck so far with an easier reproducer.