I agree it is a bug. It is an unfortunate mix of netplan and systemd decisions/features/bugs causing the issue.
Do you mind if we mark this as a duplicate of LP: #1781203? It's the same root cause (netplan apply cannot change bond parameters) just with a different presentation (netplan try). Once we fix netplan apply, netplan try should work too.
I agree it is a bug. It is an unfortunate mix of netplan and systemd decisions/ features/ bugs causing the issue.
Do you mind if we mark this as a duplicate of LP: #1781203? It's the same root cause (netplan apply cannot change bond parameters) just with a different presentation (netplan try). Once we fix netplan apply, netplan try should work too.