I'm using galaxy tab s2 sm-t813 with stock 7.0 rom. At first, I installed LineageOS and thought that was the culprit, but after flashing stock rom, the issue persists. For example, when watching YouTube, after some time, at the bottom of the screen "you are back online" appears in green. This happens when doing other tasks like browsing as well. I tried resetting network settings. I also flashed modem firmware of my rom with no luck. If I disable auto reconnect, when it drops, it stays disconnected with no wifi icon on status bar. I tried setting my dns to 8.8.8.8 and 8.8.4.4. No other devices on the network have this issue. I tried disabling nearby device scanning, tried resetting network settings. This happens every 20 mins or so. I bought this tablet used so warranty is not an option. I'm at my wits end, I don't know what to do.