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[_rossbower]

I have some code that changes the "Y" value of the translation property on a RowList.

This works

m.vueRowList.translation = [m.vueRowList.translation[0], m.vueRowList.translation[1] + topGroupHeight]

This does not

m.vueRowList.translation[1] = m.vueRowList.translation[1] + topGroupHeight

Why?

[EnTerr]

Yep! Welcome to the mysteries of scenography world. That's by design, apparently.
Don't try to mutate a Node field - it's not going to work. You have to always re-assign the property (syntax sugar for setField())

SG is a riot!