Given a dataform with duration field and a formula that divides the field seconds value by 3600.

Add a new entry. The entry form display the formula instead of nothing or 0.

This can be solved by replacing empty content with 0 when processing the formula.

Another problem is with the [[entryid]] pattern that is not resolved in new entries. When this pattern is used for a formula id so as to aggregate in the entry level, the calculation fails and the formula is shown.

A temporary and hacky solution for this problem is to remove unresolved [[entryid]] patterns before processing the calculation.