I've always seen this when the SD was limited in calculating the MAP. The injector data relies on the calculated MAP and inferred rail pressure to determine how much the injectors are flowing. if you hit the pumps max duty cycle, not likely in the return style system if you have it set up correctly, or the MAP hits a limit you will get an insufficient fuel flow condition.
Any updates on the issue? Im curious
In my 2019gt the DI injector is limited to i believe .90 in the injector data area. With my car set to .90 i hit Injector limit on E85. I raised the limit to 1.6 when max is 2.0 and i have not hit limit since.