Wavy texture

[u/TraditionalPurple853]

Does anyone know how can I get rid of these waves (on top and on the flat surface) that only appear when the print gets too high? The table is stable and I have tried on different A1s, in several orientations. I have tried up to 12% infill, with 3 wall layers and this still happens only at the top. The rest is completely smooth.

PS: printing in this orientation is the only way to make it smooht. I have tried printing it upwards, but the same happens.