Not an option, I have 40+ IoT devices that only operate on 2.4ghz.
Like a couple others in this thread, I've enabled the reboot scheduler to reboot every morning at 3am, seems to be the only way to get around this issue for now.
Any known fixes for this issue or just reboot the router each time the problem resurfaces? I have lost many hours trying to solve this issue until I came across this thread recently.