Lightroom Crop Lock does not hold aspect ratio when resized

[#1]

I have 200 images.  The first image is cropped to a custom aspect ratio and locked.  The crop is then synced to all other images.  All good so far.

But when I open any other image in edit mode, and attempt to change the size of the crop (eg. by dragging a side), the crop ratio immediately changes and the custom crop is lost.  This is very frustrating problem as I am unable to apply a custom aspect ratio and make size adjustments.  Is this normal in LR?

[#2]

I have 200 images.  The first image is cropped to a custom aspect ratio and locked.  The crop is then synced to all other images.  All good so far.

But when I open any other image in edit mode, and attempt to change the size of the crop (eg. by dragging a side), the crop ratio immediately changes and the custom crop is lost.  This is very frustrating problem as I am unable to apply a custom aspect ratio and make size adjustments.  Is this normal in LR?

[#3]

You have clicked on the lock icon to unlock the aspect ratio?