Devices connected to 5GHz WiFi after random time get into state, where both router and device thinks that device is connected, but data cannot be transferred. It is not only after device is sleeping and not transferring data, but even during device usage (e.g. I’m working on my laptop and suddenly data flow is interrupted, I’m getting ping loss to internet and Omnia). Disconnection and re-connection to WiFi solves problem until next occurrence and it happens randomly from several times a day to several times an hour.
It started few months ago, but it was rare and only Apple devices seemed vulnerable, but now any type of device is affected (iPhone, iPad, Android phones, laptops) and it happens much more often. When such connection problem occurs, Network Manager on my laptop prepeatedly logs: “connectivity: (wlan0) timed out”. When I tried to ping device’s IP address from Omnia, at several cases data flow was resumed after several seconds, but mostly I have to disconnect and reconnect again. It does not seems to be strongly related to device position/distance from router and signal strength at device’s location, as it happens anywhere, but it seems to be more often on locations with lower signal (I’m getting e.g. 80Mbit there compared to 200Mbit at location closer to Omnia).
I reflashed my Omnia on 12th of July, 2020 last time (manually upgrading from TOS 3.something to 5.0.something as automatic upgrade did not work for some time back then). I was testing if I can get the same bavior on 2.4 GHz, but was not able to reproduce it on 2.4 GHz. 2.4 GHz is not very usable here (too much interference - 3 or more 40 HMz wide networks on each channel). In contrast, 5MHz not very used, I’m on channel where my network is the only one and even nearby channels are not used.
It seems to be similar to Wifi problems – where to start troubleshooting? but that thread is quite old.
I do not know what to try to solve this situation, any advice please?