Blend > Date range > Add dimension > not working for replicated blend

In an older dashboard, I have a blend of Google Ads extracted data, and has been and still does work just fine.

In a newly created dashboard, I re-created the blend from scratch. However, this time, nothing happens when adding “Day” as a dimension under date range for either table. (And “Day” in each extracted data is a normal default date dimension).

The weird thing is I then copied over the old table to the new dashboard, which created a shell of the blend in the new dashboard. And in this variant, “Day” does populate under Date range in the blend.

This feels like a bug. Can anyone corroborate?