Orbi RBR-50 internal speed check with modem half the ISP speed

I have a 1Gig service from Xfinity and at their modem I verified speed of 999, however when checking speed of same connection between my Orbi Router and the Xfinity modem via o Netgear internal Orbi Router app Speedtest I only get 400-430 Mbs speed no matter the configuration. What is going on with the netgear device’s speed check? Due to the internal QOS doors check it also trottle’s back my wireless to about 380 Mbs. I am very frustrated, I have checked for this problem on Netgear sites and cannot find where it has been solved. I am running an Orbi router with 2 Satellites. Just so I din’t Get patented routine responses to this issue:
1. Yes rebooted
2. Yes restored to factor settings
3. Yes checked setting 20/40. Daisy chain, channels etc, not taking to wireless speed issue but the speed between router to modem.
4. Yes ISP provider called came out verified speeds at modem and I even had them change out the modem
5. Yes set modem to bridge tested
6. Yes set and tested with wireless turned off and DMZ set no change
7. Yes checked every conceivable setting no change
So bottleneck is definitely the Orbi RBR50 Tri-band router. Does Netgear have a workaround, patch, or fix to resolve this problem? I am ready to through the orbi out the window.