ORBI RBR50 wifi issue

Your issue is, unfortunately, fairly common. The iOS app and the web browser app do not always report the same status–this is a known bug that has not been addressed by Netgear.

Many have found that, after a firmware update, a factory reset and manual re-initilaization of your system will helped solve the drop out issues. This is a tedious process but seems to clear any conflicting bits of code that may be leftover from previous fimrware installs. Be certain to always update your satellites first then the router. Factory reset each satellite then the router and, finally, reconfigure your system as you like.

DO NOT use a backup config file to reset your system to its normal configuration. This would defeat the purpose of the factory reset as it might re-introduce the conflicting code to your system and allow the drop out issue to continue. 

Again, this seems to work for most people (myself included). Another "best practice" that seems to minimize issues is setting up IP reservations for each one of your devices. I also allow the ORBI plenty of "settling time" between any changes to the system, e.g., wait at least 15 minutes between any system configuration changes to see if the web browser reports the changes correctly.

Good Luck!