Follow-up for 1003093604661bd984574889167f2ff4dfd6209c. If a netdev is detached for some reasons, then previously the request was simply cancelled, and the underlying interface never enter the configured state, as the 'stacked_netdevs_created' flag never set. This makes the counter decremented manually by the function, and set the flag. So, the underlying interface can eter the configured state.
System and Service Manager
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