Issue confirmed.

System information

3.7.0-rc2 (nightly Build)
macOS Sierra, 10.12.4
Firefox 52 (64-bit)

MAMP 4.1.1

• PHP 7.0.15
• MySQLi 5.6.35

Seems related to #14377 #15244
Unfortunately currently is not possible to change the Field parameter for a context (com content, com user, com contact or external component)

Nope, this is not related to the other issues. It's just that com_contact has an override for the field layout and that one doesn't check the label parameter.
See https://github.com/joomla/joomla-cms/blob/staging/components/com_contact/layouts/field/render.php
I don't know about the user one, that one should use the regular layout as far as I know.

The regular JLayout is this one: https://github.com/joomla/joomla-cms/blob/staging/components/com_fields/layouts/field/render.php

oppsss... sorry
then a new bug for the custom fields

Well com_users doesn't use an override yet for the field layout it doesn't use either the regular JLayout

At least it can be easily addressed for com_contact

If I'm not wrong, but com_users uses JForm to show the fields. It has a totally different behavior than com_contact. But yes, com_contact should have the same behavior as com_content.

@laoneo can you do than a PR for fix the com_contact behavior?

Please test the pr #15756 which should fix the contact label hide issue.

closed as having PR #15756

Set to "closed" on behalf of @franz-wohlkoenig by The JTracker Application at issues.joomla.org/joomla-cms/15304

but the PR is only for the contact, the problem is also in the user, please reopen.

As already said, the profile view is a form and has a totally different set up. I suggest to open a new issue for that one as the logic is very different then the rest of Joomla.