The coaxial cables which are connected to the hub and V6 have exactly the same specification*, and the only difference is that sometimes the lengths are not the same or, occasionally, a cable is faulty.
* There are two types but you would expect to get the same type for a single installation.
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Hub 3.0, TP-Link Archer C8, TP-Link TL-SG108S 8-port gigabit switch, V6