If you have a clean system, i would do:
1) hotfix 160106 (provided by ITUS)
This one may overwrite network/dhcp settings, you will have to reboot afterwords. (files /etc/config/dhcp and /etc/config/network
2) hotfix 160309
3) fw_upgrade7.1
No more: Shield Pro v1, Chaos Calmer, FW 1.51 SP1