Streaming/Browsing issue on C7000

Not sure what the issue here is. I have the 150MBps internet service from Comcast, and ethernet speed tests show I am getting it.

What is bothering me, (and maybe its a Comcast issue) when my wife is doing a Facebook Live video for her work, using a cell phone or tablet connected to the 2.4GHz frequency. If I do something on my tablet or phone it will cause a disruption or weak signal to her stream. What bothers me about this, is I am connected to the 5GHz frequency.

Could this potentially be a setting I screwed up in the modem? Or would this be on the Comcast Upload side?

Thanks!