I checked again and unfortunatelly it doesn't work again :( Even after rebooting all devices. Also I did a test. I set QoS to 50 (download) / 10 (upload) Mb/s, did a reboot and test the speed (my...

For me it works after latest update 1.5.0 20210511 Rel 344580 It is 3 months already and there is no problem with the speed