Route on ND is a straight line when it shouldn't be
I've had a couple of flights where the route on the ND did not depict what it really was, i.e. different headings for certain legs, but just as a straight line. For example, a SID that runs 2 NM on runway heading, then 90 degree left turn for 4 NM, then 30 degree right turn - all shown as a straight line. Switching on "DATA" to show Navaids and Airports they all show on that straight line.
Is that a bug? Is there some manipulation that I should not have done?