I got a new DIR-882 to replace my aging DIR-880L, which works flawlessly, and now it's been nothing but trouble. First, the router randomly disconnects from the internet and sometimes even a reboot won't bring internet connection back on. (I have to unplug power for a minute!)
Secondly, my android phone does not always get its notifications. But I do get them when I am in 3G ,4G and LTE. I tried turning on or off all firewall options but still no notifications under wifi. It looks like the router flushes TCP, UDP connections too fast.
Then I decided to flash DD-WRT and everything worked well, I would get the notifications but as you know the 2.4Ghz radio is broken (low speed) and under a fast download the router crashes. So back to stock firmware through emergency recovery to test again and the problems are still the same. Even my cheap spare router does not show these problems. I will be returning the router as I do not plan to wait for a stable firmware.