I've seen this in `NetworkManager-1.34.0-0.3.el8.x86_64` (latest in CentOS
Stream 8 at the time of writing this message) which does not use the latest
Systemd but probably the code base is the same (see
https://github.com/NetworkManager/NetworkManager/commit/51f93e00a23fbd09f5ad96da6290bf4ca737d46a).
Before the patch:
```
libsystemd: eth0: DHCPv6 client: T1 expires in 34y 3w 6d 45min 31s
libsystemd: eth0: DHCPv6 client: T2 expires in 54y 5month 3w 3d 23h 20min 35s
```
After the patch:
```
libsystemd: eth0: DHCPv6 client: T1 expires in 3d 7h 58min 3s
libsystemd: eth0: DHCPv6 client: T2 expires in 5d 2h 26min 50s
```
same box (x86_64 system) and same DHCPv6 server.
This regression has likely been introduced by 8a8955507a.
System and Service Manager
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