[Inner walls layers not connecting]

Problem fixed by using Slic3r instead of Cura

[Inner walls layers not connecting]

Hi,

I have problems when printing inner walls like for example holes.

The first layer works correctly but the next layers are just a stringy mess and don't connect correctly (see attached photos)

I have tried with higher temperature and more flow and I have also used higher infill overlap but that didn't work.

By the way I used PLA at 205C 40%infill 120flow 0.4nozzle 0.2layer height 1.2wall thickness on the Anet A8 with Cura.

Any ideas what could cause that problem and which settings I could try?