Impacted versions: 10.0 (at least)
Steps to reproduce:
Just found out that the field "item_ids" is replaced by another field "pricelist_item_ids" in the view "product.product_normal_form_view", which explains the second problem of the bug...
FIX bug #15009 display pricelist name in the Pricing section of produ…
…ct.product form view
The second problem is fixed in the PR.
The first problem only happens when the is no pricelist item for that product. When the product (or it's product template) has some pricelist item, the O2M widget is immediately shown. So it's not a big problem (even if it's still a strange issue).