R7000 boot loop when WAN connected

Using latest tomato release on my netgear r7000 and it works beautifully except for one niggling problem.

Every time I reboot the router it will get stuck in a boot loop until I unplug the WAN connection and then it'll not fine. I can then re-insert the WAN and everything will be fine.

Is there a script or anything to pause/disable WAN until the router has fully rebooted?

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