Hello, i made some adaptive mpd, on this site: http://sivtest.ddns.net/DASH/

When i play the http://sivtest.ddns.net/DASH/BitrateVar/sintel10sEst/10s.mpd on MP4Client the video star with the more low rappresantion (50k on WiFi network and 100k on LTE Network) and it's switch in the highest avaliable (25000k on WiFi and 7000k on LTE)after ten seconds. Obviously this values are typical of my connection. My question is that: why the video start to the low rappresentation if my bandwidth are stable in the streaming time?