Orbi RBK50 loses speed every day without daily reboot

I can't say whether ChristineT can help with this - she has had her hands full for the last few days with another technical issue (also on the community boards). 

Do your speeds improve when you power down the cable modem?  FWIW, I have Xfinity and have periodic problems with my wifi and since one of the main "cures" was to turn off the cable modem, I finally took the extreme step of connecting the modem to a daily timer so that it powers down every night and then turns back on a minute later. I don't think you should be required to do that with the Orbi system, and I don't think I should have to do it with my cable modem either, but