That's definitely odd and many factors can be at play. Have you restarted the modem and tested again?
That said, if this persists, please contact our tech support team. They're the experts in the matter and will be able to help out
You can chat with them here or call them at 1-888-259-3436.
Keep us posted!
Tech guy came same day as trouble call! Impressed by that.
He changed connectors but things didn't improve. He eventually changed the modem and now I'm good to go!
Impressed by same day tech visit for sure.