MSFS2020 acting as bandwidth limiter

[ITDreamFly]

Sounds similar to this:

Network speed drop when MSFS2020 runs

I am struggling since a while with a strange phenomena; when MSFS2020 runs then speedtest shows dramatically slower network speed on MSFS PC. I would not care too much, but other day even Vpilot client disconnected, web browser could not load pages. I can only observ this strange behaviour with MSFS, in fact I have no other gane to test. ISP: 2.5Gbps fiber optic, provided Zyxel router Home Network: Zyxel router → LAN cable → 1Gbps switch → direct LAN cable to RJ45 sockets (3x), direct connecti…