Incorrect scale after image convert

The output image dimension for coronal and sagittal (x and y axis) were all squeezed to incorrect shape. In my case, the 512x512 image becomes 512x120. Is there any way to ensure the output scale or dimension? Really appreciate if anyone could help. I have been finding a solution for days with no luck. Thank you.

Start by reproducing the reported conversion with a 512x512 image and compare the output dimensions for the coronal and sagittal views. Trace the conversion path responsible for those views; done means the output dimensions no longer collapse to 512x120 and the intended scale is preserved.

Written by the indexing model from the issue text.