Beamforming and MU_MIMO default settings

I might have a little insight into why these settings are checked off. I had manually checked those settings and all was well for weeks until last night.

Last night while I was working I noticed my internet running very slowly, around 1mbps download and 1 upload. With my ISP I pay to receive 45mbps down and 5 upload. After calling my ISP, disconnecting my orbi system and running ethernet from ISP gateway to my computer I was getting full bandwith. The second I plugged the orbi back in bandwidth would drop. I called orbi customer support and I was instructed to uncheck Beamforming and mu-mimo. Once unchecking those options my bandwidth was back to normal. Netgear tech support said their developers are working through issues where those settings are causing bandwidth to drop. Might be a good idea to leave those options unchecked in the meantime, seems as if there is a good reason why they have disable those settings by default at this time. Hope this helps.