My Wi-Fi bandwidth regularly drops from 144Mbs to 48Mbps (Windows 10, 802.11n). At the same time, the download speed temporarily goes to zero.
It does not seem to be hardware related - I have tested the USB dongle (https://www.amazon.fr/dp/B077X5Y2LT/) I use on another devices, and it works fine. Reinstalling Windows is also useless.
However, in Wireshark, I found that whenever the bandwidth drops there are "TCP previous segment not captured" and "TCP dup ACK" messages. What is going on?
