Netflix, in common with all streaming & OnDemand services, use the internet. Your V6 connects to the internet via your homehub, which should ideally be an Ethernet cable connection but is often wireless.
How is yours connected? If wireless, what's the signal strength? On the V6 menu, follow Home > Help & Settings > Settings > Network, and check in the top-right.
Are other OnDemand & streaming services affected in the same way?
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