Comodo & DHCP - problem getting IP

one of my clients is having an issue where after restoring the laptop from hibernate or just returning to the laptop after the weekend, the computer can’t get the IP address from the DHCP server (on a win 2003)
problem is temporarily solved by shutting down comodo, replugging in the lan-cord and then starting comodo again

rules are mostly default, added some additional allow rules (no block rules created, neither in application nor in network)

any ideas ?

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