[Maya] Cannot freeze object: this prevents a custom pivot from proper alignment

FrankW

Hello,
I have a problem in Maya. I am trying to align a custom Pivot along one of the edges and every time I do so the axis is not perfectly aligned.

I noticed Maya gives a warning complaining about the object not being uniformly scaled. The suggestion is to freeze all transformations. However, even though I try to do that, I still get the same warning. I am not sure what I am doing wrong.

Here's a link to the Maya ascii file:
https://drive.google.com/file/d/19m6CqYLiiO7MR5eBKbvuVt6Byd1cJDzF/view?usp=sharing

Below is a link to a video (demo of the issue)
https://drive.google.com/file/d/1FIZLsK8Tr4J5EOjfVRZmu7IRjGDSDOL6/view?usp=sharing

Thanks

FrankW

It turns out the problem was a containing group. After Freezing and resetting all transformation of that group, everything works again.