You specify tfm_y=True, so yes it is applying transforms on the input and targets. Remove the tfm_y=True to not apply them to the target.
And if you don’t want transforms applied to your inputs, you need to use a custom class you have to write since your inputs are not traditional images using data augmentation. It’s not because ImageImageList does not behave the way you want, that you have to say it behaves the wrong way.