Not sure if this was reported or a known issue. I encountered an issue when trying v7.1beta2 L3 offloading on CRS309:
I have 2 interfaces bonded together and configured as a VLAN trunk port. By setting l3hw=yes, all routed packets get out of the trunk port without tagging while L2 packets are still correctly tagged.
I also tried disabling l3hw and rebooting, the bonded trunk port works again.