Dear Yesoos and Daniele,
I was looking for answers for my problem and I believe this is the same problem discussed here as it clearly correlates in time with a nice plot attached in the beginning of this thread. There must have been a firmware update rolled out to the routers beginning of February when I also have started experiencing spontaneous lags/latency issues with internet. This results in occasional annoying browsing experience, Telegram calls being dropped, and some of my WiFi devices reconnecting. I cannot exclude/confirm if this is a WiFi-specific issue, but there is clearly also another problem (appeared in the same time) between WiFi and wired networks: staring ssh sessions constantly gives me this error message: “ssh_exchange_identification: read: Connection reset by peer” (I never see this if I connect between devices exclusively on wired or WiFi networks).
Please, advice me if I need to create a separate report in the forum for not to mix different issues and mess up the focus of this thread. But, I hope my comment can potentially add a bit of an insight on how and when the problems appeared.
Thanks,
Khristian.