Hi There, 

We recently switched to fiber optic internet through Aussie Broadband with 1000Mbps download speed & 50 Mbps upload.  We purchased the BE550 Archer router to take full advantage of the speeds.  However, we have found there are issues at least once a day with our speeds slowing drastically, sometimes falling below 10Mbps for both download and upload, when they are usually over 900Mbps/40Mbps normally.  This seems to impact all devices on the network, with no device seeming to get any kind of priority.  

Originally, we thought this might be related to the modem, but have contacted Aussie Broadband and found no issues with the modem.  I've also found that, when the speed drops, if I simply disconnect the router from the modem and reconnect, without power cycling either device, this will resolve the issue.  Again though, this has become an almost daily occurrence and impacts both our wired and wireless devices, with the 10Mbps second speed test coming from a wired device.  

QoS is disabled on the device and there are no parental controls active.  We've also experienced this issue with OFDMA/MU-MIMO both enabled and disabled.  I have also tried factory resetting the router, to confirm that I have the correct settings active, even just going with the most basic settings to have Wifi active.  At this point, I am thinking this might be a hardware issue with the device, but wanted to confirm if there might be anything else I could be missing.  

Any assistance or guidance on resolving this would be greatly appreciated.