POE1 servers intentionally dropping my connection, pretending it's an “unexpected disconnect”

POE1 servers started disconnecting me every 3-5 minutes on the weekends. It happens when the load (battle intensity) increases, mimicking it as a network issue. Game freezes for 5-45 seconds, followed by either “unexpected disconnect” (90%) or death. This started last weekend and “fixes itself” on weekdays.

PS5, wired connection. Ping to the game server(s) is stable. Connected to multiple EU servers, used 2 internet providers, selected Hybrid/Auto settings, connected via VPN - none of this changed anything.

The game pretends that the connection is interrupted, although third-party tools show that the Internet connection and (trace)route to game servers are stable. The disconnect correlates with the intensity of operations, almost never occurring at low game activity (just moving around the map).

If nothing changes, I will demand a full refund. I lose maps and experience when I die, playing on weekends is a frustration.

No 'technical support'? Not at all?