additional ip is not removed after try/revert

[Philipp Gassmann]

Add additional file

/etc/netplan/51-floating.yaml:
---
network:
    version: 2
    ethernets:
        eth0:
            addresses:
                    - 172.16.16.16/32
...

Run: netplan try --timeout 10

Result:
IP is added to the interface, but not removed after the revert from netplan try.

Expected result:
If an ip is added by netplan try, it should be removed after the revert.

System:
Ubuntu 20.04

# dpkg -l | grep netplan
ii libnetplan0:amd64 0.102-0ubuntu1~20.04.2
ii netplan.io 0.102-0ubuntu1~20.04.2

System Type: Hetzner.com cloud server with default cloud-init:

cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by the datasource. Changes
# to it will not persist across an instance reboot. To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    version: 2
    ethernets:
        eth0:
            addresses:
            - 2a01:4f8:dead:beef::1/64
            dhcp4: true
            gateway6: fe80::1
            match:
                macaddress: 96:00:00:00:00:00
            set-name: eth0