Dialog item model in body doesn't scale correctly

When using widthand/or height in the item dialog body type, the item model itself is still rendered at its original size, but it’s put in a container that is scaled (see image). I expected that the item model itself would be rendered at a larger scale.

How to reproduce

/dialog show @s {type:"minecraft:notice",title:"Test",body:[{type:"minecraft:item",item:{id:"minecraft:acacia_sapling"},description:{contents:"Test"},width:100,height:100}]}