Hi,
I created a several products and several product bundles (all published). To make a long story short, I also created all the necessary records that are mandatory. I created the Unit Groups with Units and the Price Lists with Price List Items.
Here comes the weird behaviour. When I have an Opportunity I select the appropriate Price List and then I add the appropriate Bundle. So far so good.
I can see the Bundle in the Product Line Item subgrid. I can also expand the Bundle and see the two Products that belong to that Bundle.
Now comes the strange thing. The field Price Per Unit behind the Bundle is filled with an amount which is the appropriate amount.
But behind the two Products the field Price Per Unit is empty.

These should have an amount. When looking at these two Products in the Product Catalog, the amount is there.
When I add these two Products separately in the Product Line Item subgrid, the field Price Per Unit is filled with the right amount.

To conclude it, when adding a Bundle in the Product Line Item subgrid the Products that belong to it have an empty Price Per Unit field behind it. Adding them separately will show a filled Price Per Unit field.
I'll hope somebody has an answer to this.
Br,
Jacques