I changed my field position of the 'focus' field to be the first field of the note type.
Then I added a new deck, which had all 'focus' fields empty.
I ran recalc with modify permissions.
After that
tags of the new cards were set, including 1T, etc. and Frequency
the 'Focus' field was not populated for any of the cards
Once I changed position 1 of the note type to a different field and ran recalc, the focus was being populated again.
I changed my field position of the 'focus' field to be the first field of the note type. Then I added a new deck, which had all 'focus' fields empty. I ran recalc with modify permissions.
After that
Once I changed position 1 of the note type to a different field and ran recalc, the focus was being populated again.