Please help! Samsung HW-Q90R Soundbar WIFI issues

Hello everyone, I'm desperately in need of some help I'm having the weirdest issue. I have searched everywhere online and I can't seem to find any help on it. My Orbi router RBR50 has been working flawlessly since I bought it in December 2019. However now I purchased a Samsung Soundbar HW-Q90R and my Wifi is garbage in the living room. It's the weirdest thing... when I unplug the soundbar (not when I only turn it off but unplug it) the Wifi is extremely fast 120mbps+ but when I plug the soundbar in the wifi drops to 3mbps-7mbps. I tried playing around with some of the channels but nothing seems to be fixing it. I also turned off Wifi on the soundbar and that didn't do it. I have the sound bar connected via HDMI-eARC to the TV set and no other connections. The other 2 rear speakers and subwooder are wireless. The soundbar is the only thing I have plugged in and I'm having the issue so I know it's not any of the other devices. I contacted Samsung support and they basically said they're unaware of this issue and they can't help me. I'm completely lost and have no idea what I could possibly do to get this working. I like the sound system so I'm really upset it looks like I'll have to return it for some other model. 

If anyone can think of anything we can try doing to resolve this you'd be a lifesaver for me!