I turned on Insights today, but have same problem. I can't see orange bar. VA3 FW 7.00
Which insight exactly are you speaking about? Steps, Floors, Sleep, Running, Cycling, Lap Swimming, Open Water Swimming, or all of them? The orange bar disappears usually when there is not enough data for given period for the respective activity.
Verify your Privacy Settings, especially the option Insights must show Agree, but make sure that also Storage & Processing and Device Upload are enabled.