This issue did have some work done on it in v3. Edo, what version are you running?
The issue was that where there was a vertical wall above a top surface, the top surface was stopping short of the next layer, leaving a weak edge. The changes in v3 were to extend the top surface so it underpinned the perimeters of the layer above. I can remember the thread on the subject...but have no idea how old it is and what it was titled, so it'll probably be hard to find.
Having done a quick test in v3.0.2, it seems this does happen.......but the underpinning doesn't run under all of the perimeters - it runs under all bar the innermost perimeter. Here's what I mean:
Pre v3 it was worse than this - the solid infill(green) stopped short of the outer perimeter. Like this:
An interim solution for this part is to increase the number of perimeters so the top attaches better. And there needs to be an error reported that the fix already done doesn't quite work as it ought to.....because the infill falls one perimeter (at least) short.