Actually, doing a little further poking around...
It looks like network-manager will set the hop limit based on what is
given by the router in the v6 router advertisement.
In my case, the local gateway will specify the hop-limit as 0 in its
advertisement, and network-manager will take it as gospel.
I reckon if the value received in a router advertisement is 0, it should
default to something like 64.
Best Regards,
Yinette
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