Cura Under Extruding

[inventabuild 4]

Please let me know if anyone has any suggestions for why Cura is under extruding in the middle of the "O" in the word "You".  You can actually see through to the tan table in parts of the middle of the "O".  This is after two layers of printing.  Coast is turned off.

Here's Cura's slicer view showing that Cura does want to print a solid in the center of the "O", but as shown above for some reason Cura is under extruding there.  Any help is appreciated.

[inventabuild 4]

This is definitely a problem with Cura 2.6 under extruding in some small spaces like the center of the "O". It also happens in the center of "B". The weird thing is that it doesn't happen in all small spaces, just some of them.

Does anyone know if earlier versions work better for small spaces or if there is a special setting to deal w/ the issue?

Is anyone else printing text size 9.5 mm and having problems (or success)?

[foehnsturm 967]

I'm a bit late but: Do you use a prime tower and does Cura want to start the layer with printing the perimeter line of this small area?

[inventabuild 4]

I'm using a skirt around the part which is 120x110 mm so the exruder is fully primed when it starts printing and the under extrusion happens when filling in other letters as well, but not all of them. In fact some O's get completely filled in and others have under extrusion. This is what is such a mystery to me and the reason why it seems Cura might be the reason for the under extrusion.

Under extrusion does not happen with KISSlicer and Simplify3D when filling in the letters.