“DHCP lease expired” errors on multiple clients

Hi all (and Tim, possibly still Thomas..)

In my environment, we have a mixture of V10LE, C10LE, 3010 & 3040 clients.

Recently, after a major network equipment change, all our thin clients started to have issues with renewing their IP leases showing the below message:

The clients use the DHCPExpire=reboot wnos.ini option.

Strange thing is that some clients seem to come up with this error 2-3 hours after being power cycled while the DHCP lease time for them is 7 days.

Have you guys seen these errors in your environments? Is there anything I could do my side to address this, without reaching to the network team?

Thanks for your help!