Noticed that Cura 5.3 breaks the way most 3D printed airplanes get sliced.
Cura 4.3 breaks Eclipson (& others) continuous mode when there is for example 2 bottom layers.
So far I found no setting to fix this except Spiral mode which removes features. It could be related to the "Fixed the order in which concentric top/bottom patterns are printed" change.
For context, especially for LW-PLA, it's really important to get a single continuous line for each layer with no jumps in possible. Ideally there would be a Spiral/vase mode that doesn't remove the internal structures however so far it's mostly achieved in Cura by setting 0 infill and having some rather special STL.
See also https://www.facebook.com/groups/146642260886244/permalink/488982829985517/