[4.x]: Conditional fields' visibility not getting updated when in preview mode

[thupsi]

What happened?

Description

When in preview mode, changing a field that controls the visibility of another field, does not have the expected result of toggling the second field's visibility.

Steps to reproduce

1. Add a field condition. Let's say have a text field that should be visible when a lightswitch field is activated.
2. Open an entry with those fields and enter preview mode.
3. Toggle the lightswitch field

Expected behavior

The text field should be visible

Actual behavior

The text field remains hidden (It becomes visible though when the user exits preview mode)

Craft CMS version

Craft Pro 4.0.4

PHP version

No response

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions

[brandonkelly]

This is a known issue, but not one we can fix immediately, unfortunately. Most likely will have to wait until Craft 5.

[thupsi]

Ok, no big deal. Good to know it's on your radar!

[ItagMichael]

I just noticed this issue in a big way on a very condition-heavy section. I don't suppose it would be easy to have the live preview version of the form show all fields regardless of conditions? This would at least mean that no fields are inaccessible in live preview.

[brandonkelly]

Unfortunately no, as any fields that are “hidden” due to conditionals are not present in the form at all – not simply hidden via display: none.