Verizon 5g home 2021

I just recently upgraded to Verizon 5G Home and it has wrecked havoc on my streaming capabilities. Buffering on all connections but my direct connection to the my Nvidia shield. Before the upgrade I had slower internet and everything was fine. All speed tests show 150mbps. Not sure why all the buffering. Any help would be much appreciated.

Are you using Verizon’s router directly, or did you add your own router behind their’s?

Using it directly.