There are two ways to edit submissions. The first is to edit each submission individually, which is probably what you are doing, via this:
This will basically fire up the Enketo web client, prefill a new submission with the existing submission data, and effectively resubmit (!) As such, any existing skip logic in the form, constraints, etc will continue to be enforced, which will cause previously hidden fields to remain so.
What you probably want to do instead is edit the raw data. You can do this by selecting the specific submission, and then performing a bulk edit on it, via this:
You can then directly edit any fields as desired.
