I don’t know how long this has been happening but a couple of months ago I noticed my internet speed drops from 1Gbps to 90Mbps when I turn on my PC, reboot, and update. My “solution” has been to unplug and then, well, plug back in, my Ethernet cable.
Windows and Debian do not have the issue. Strangely, neither does openSUSE KDE or GNOME (I use XFCE). Just me? Any ideas on how to troubleshoot it? I can’t reproduce it outside of my current system.