Fast reports don't support max speed.
not sure what you mean byt fast reports , but i am talking about summary page and trip page, in 5.8 it used to show the value of max speed no matter how long the period you chose , but now its only showing maxspeed value for today and yesteday , the rest is showing max speed =0
its beyond me how this is working but i am founding that max speed value is always zero in summary and trip report pages and if the period selected is longer then 24 hours . i ve checked stable release 5.9 and its still happening . i think the issue is in the 5.9 server release .