Indexed-repeat problem with question types other then calculate

IndexedRepeat 01 GR CALC.xlsx (40.5 KB)
We need to confirm, please, if we can use this? (KoBoCollect)

In case NOT, we would like to see another solution, please?
The 1st requirement is, to check age of current person against age of head (first person), based on relationship. Here is a more real example: HHRoster01.xlsx (17.1 KB)

A 2nd requirement is to show current person info in the repeat header.

Both is working FINE in KoBoCollect, but not in Preview Enketo. WHY??
Thanks in advance!

We meanwhile found another problem which may be related. See Missing update of Label with calculate reference in Repeat - Enketo (Preview))

Kind regards