Default is to print outer wall first, but maybe printing inner wall first (outer wall last) would mitigate the artifacts? The theory being that there’s something to attach the outer wall to when it gets laid down. You can easily change this in the slicer settings. Regardless, it looks as though there is some kind of attachment issue in securing the outer wall of the cube to the inner wall of the circle, and once that fails, the failure compounds and gets worse with height.
The inner wall of the circle looks puffy on the right hand side as compared to the left. That’s what I’d focus on as the key to sorting this out. As was already pointed out by someone else, this seems consistent with filament whose moisture content is too high. Either dry the Prusament, or else try some other filament that’s fresh and dry.