Hi
I use Fritz! Powerline 1000E and never had problems with it
However, I've had groundless highping for 2 days and since today it's all off and on as soon as I start a game (CSGO, Fortnite, Minecraft)
I also have a 0.7 download
At the Pc of my father I have with the same Powerline 88 download
DLAN is very prone to failure. Actually, every household appliance should be equipped with a line filter to avoid interference on the lines. Such as: https://www.amazon.de/...B00KF9KBUK
Of course that would be expensive. Fortunately, there are also simpler filters that are attached only to the cable. https://www.amazon.de/...B07F6Z2B8W
This can be used on all devices that could cause interference. This includes your PC. Of course, only the DLAN devices themselves must not have a filter, because they are supposed to send a signal to the power grid.
Another solution would be to use Wi-Fi or better yet lay a LAN cable.
How well DLAN works depends heavily on your power lines.
The worse shielded - the more unstable and slower the connection.
Since power lines are often not shielded, it may already be enough if a cordless telephone is in a "new position" in the apartment and sparking to itself or a neighbor takes a new router in operation.
Even a neighbor with his own powerline network can "steal" bandwidth and speed. Your network does not stop at home boundaries and can also skip phases.
