Steps to reproduce the issue

1.) Create subform
2.) My code in subform:

<field name="multiple_media" type="radio" default="no" label="Is there more than 1 image or video in this group?" description="Toggle for additional figure content." class="btn-group">
		<option value="yes">Yes</option>
		<option value="no">No</option>
	</field>

3.) Add field(s) with showon. My code is:
<field name="media-image" type="media" showon="media_type:image" label="Image" directory="" preview="true" preview_height="150" />

Expected result

Fields with showon should show up immediately when option is chosen. It only shows if I save the article after the subform has been created and can be toggled on and off once it is saved.

Actual result

Fields with showon do not display until after the article is saved.

System information (as much as possible)

• Mac with MAMP Pro
• Joomla 3.9.1
• PHP 5.6.37