I have a weird behaviour with my Arcadyan VGV7510KW22 (o2 Box 6431) running 18.06.02.
When starting a speedtest from speedtest[.]net, everything is fine. As soon as I use the Speedtest app for Android, the modem led turns off, connection is lost and the box reboots.
This also happens when using the Speedtest app on my Mac.
I tried 3 different firmwares, but always the same behaviour. When using the ADSL-Firmware that allows max speeds of 15Mbit/1.5Mbit (the one that comes with openWrt), these reboots don't happen.
Has anyone with this Box the same issue?