What is the problem?
When printing via OctoPrint (fresh install), the flow rate is obviously lower than the "correct" amount (sparse lines). Printing via the printer directly does not have this problem.
I think I encountered similar situations before, when I 1) used Repetier to print, or 2) set "in mm^3" for "Filament" on the printer. So I suspect there could be some obvious option to fix this but I overlook.
What did you already try to solve it?
Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible)
OctoPrint: Version 1.4.0;
OctoPi: The ready-to-go Raspberry Pi image with OctoPrint, Version 0.17.0, running on Raspberry Pi 3 Model B Plus Rev 1.3;
Printer: Anet A8;
Firmware: Marlin 1.1.9;
Flow rate: 100% (unchanged).
Slicer: Cura 4.5.0