I've recently got new powerline adapters (TP Link AV600 TL-PA4010 Kit) and I've started to experience bandwidth capping at 2Mbps during game streaming with GeForce Now. I switched to this powerline adapter from a Zyxel PLA4201v2 (an old model) for the higher bandwidth capabilities, but on the Zyxel I didn't experience any bandwidth capping.

I know it's not the ethernet cables, or quality of the powerline connection, or quality of connection between servers. I have internet speeds of 100Mbps, which is detected by GeForce NOW, yet it still bottlenecks.

Why does my current powerline adapter cap bandwidth when streaming on GeForce NOW whilst my old one didn't?

Thanks.