New RAX120 Firmware 1.0.1.136 is trash I rolled back

122 is not the last version to roll back to for a start, its 128! Secondly just factory reset the router, I`m using 136 with similar devices and have no issues like yours. I always factory reset after an update it cleans up so you start with afresh slate and makes sure you have no conflicts from old to new firmware, it gives way less problems. I'm disabled, in constant pain also using a wheelchair and if I can do it with all my DHCP reservation and other settings in about anyone can. Rolling back on a security udate is also a bad move as it will leave your router open to attack. Don't update via the app and don't use auto update, that's my mantra. I always update manually from a connected computer having downloaded the firmware first.