HI there, I am getting exactly the same fault with my Mavic. GO 4.0.2 on Android/Sony Xperia Z3.
Zebra stripes are present in other modes, but not D-Log.
Is this an issue that is likely to be fixed?
D-log has greater dynamic range. That is, it can capture details in the highlights that other modes cannot. maybe you just have not overexposed enough in D-log to get the warning.