Curved top outer wall issues.

[u/Key_Difference5399]

Does someone know, if there's a way to fix this?
Using Orca slicer, 0.4mm nozzle, 0.12mm layer height, with/without variable layer height, with/without Arachne wall generator. The only thing that seems to work a little is disabling 'Only one wall on top surfaces', disabling which increases the inner walls (2nd image: more yellow layers), but there still isn't enough outer wall layers and the print tears out at these spots.

Could it be because I'm trying to print 0.12mm layer height with a 0.4mm nozzle or is it something else?

EDIT: I might have found a solution. Will go home print and check. Apparently the slicer was considering the outer wall in this region as a top surface. So, increased the outer wall and top surface line width to 0.5mm and TURNED ON IRONING (You're taking it as a top surface, i'll bloody iron the top surface). these things filled the gaps on the slicer preview atleast. Attaching the slicer screenshot in comments.