I Wanaho duplicstor 4s . A finished model from tinkercad I modilerat . The modified kracklilerar more than originals. Corners bend up . PLA plastic both colors the same result. Program Bug? Whoever gets the worst was the plate 83grader . Tested olila temp . After 12mm height perfectly. I’ll test without additional fan o cold plate ?
A heated bed can cause some distortion in the first few mm. Try without.