Hi,
You must turn on debugging on all rules that interacts with any of the fields in question to see what is actually going on.
Keep in mind that the way rules work in classic DFFS is that if not disabled, all rule actions are reversed if the rule does not match (required fields become optional, hidden fields become visible and so on) – toggle “No reversion in this rule” to avoid this.
Let me know if you have any questions.
Alexander