RAX120v2 Randomly Reboots Only While Streaming Over Wi-Fi

I’ve had my router for a few months now, but this issue has been happening since the beginning. Everything works perfectly with the Wi-Fi except for when someone starts to stream something. I have about 20 devices connected to Wi-Fi (a few echo dots, Roku, security system, washer and dryer, and then two laptops, one desktop, and two phones, and two iPads). There are no issues with the Wi-Fi randomly rebooting until something gets streamed through the Wi-Fi. Sometimes it restarts immediately and sometimes it goes days without restarting while streaming, but it for sure happens weekly. The firmware is updated to the most recent version, I’ve made sure it’s at a good location where it won’t overheat, and I’ve made sure that there’s not a bunch of electrical devices near it that might cause interference. It’s gotten to the point where I hooked up an Ethernet connection to the desktop and TV so that it won’t restart on an important work Zoom call or while streaming. However, it’s lame because I can’t stream through the Roku with that setup (no Ethernet jack on the Roku). I have to do it through the native smart TV apps. Any thoughts on this? It’s annoying buying such an expensive router just to have to rebooting randomly on me.