[Scalable extra prime]

I have also this problem. Filament is coming out while travaling over areas. This amount is missing at new start up. It's funny no one's ever noticed...

[Perimeter Gaps at start]

Hello folks,

I have the problem that at the beginning of each perimeter too little material is extruded. This creates gaps between the perimeters. I print Janbex Filament white PLM with 1,75mm and a printing temperature of 190°C. An Anet A6 printer is used.
more settings in Cura 3.6.0:
Filament setting. 1,77mm (measured)
Layer high 0,2mm
Speed 30mm/sec
Flow 90% (with 100% it is not better)
Nozzle size 0,4
Wall thickness 0,8mm

I have searched a lot on the Internet, but I only find problems where the gap is always present. I have no idea why the gap is only at the beginning of a new line.

What could be the problem? And how can I solve it?