Nested multi-reference insert

I’ve been using the subtable feature on insert/update along with form repeats and they work great.

Now trying to include a subtable multi-reference inside a multi-reference of a subtable.

Table structure is:

quotes
quote_prices
quote_price_transhipments

Every quote has a multitude of prices and prices have a multitude of transhipments.

In the db manager, prices properly shows all fields as a subtable of quotes.

However, transhipments does not display all fields. The subtable multi-reference under prices is seen, but it does not show all columns.

Wappler shows:

Screen Shot 2022-09-09 at 4.57.23 PM822×248 7.83 KB

External db manager shows:

Screen Shot 2022-09-09 at 4.57.53 PM721×332 33.3 KB

I was expecting to see the transhipments subtable here (but it does not):

Screen Shot 2022-09-09 at 5.01.09 PM1980×1104 409 KB

Can anybody see any errors with this structure?

Are nested subtables multi-reference tables supported?