Hi,
I have seen recently that in the interactive dashboard if the parent view (deck) had no record selected, the child view (details) was blank.
In the past, the details view used to go to the first record in the table.
Now it does the same.
Has something changed?
Your post contradicts itself. Please clarify.
Old behaviour
With no record selected in table view, the details view would show the first record in the table
Recent behaviour
With no selection in the table view, the details view would be blank
Today’s behaviour, showing the first record, like the old behaviour
Now it’s back to being blank 
I have no explanation at all. If it remains inconsistent, I advise you contact support@appsheet.com.