create a set of fields that are list type.
view the fields in admin you will see 2, one functions one doesn't.
2 fields for each list field, one functional one none.

Also field row is NOT repeated.
<field name="fontsChooser"
type="Repeatable"
icon="list"
label="TPL_SERENITY_FONTS_CHOOSER_LABEL"
description="TPL_SERENITY_FONTS_CHOOSER_DESCRIPTION"
select="TPL_SERENITY_FONTS_CHOOSER_SELECT"
default="{'Elements':['body','h1','h2','h3','h4','h5','h6','p','a','i','ol','ul','li','span.company-name','span.company-slogan'],'Function':['Body','h1','h2','h3','h4','h5','h6','Paragraph','links','i','Ordered lists','Unordered Lists','List Element','Company Name','Company Moniker'],'Font':['','','','','','','','','','','','','','',''],'Size':['','','','','','','','','','','','','','',''],'Weight':['','','','','','','','','','','','','','',''],'Style':['','','','','','','','','','','','','','',''],'Color':['','','','','','','','','','','','','','',''],'backgroundColor':['','','','','','','','','','','','','','',''],'backgroundhoverColor':['','','','','','','','','','','','','','',''],'linkColor':['','','','','','','','','','','','','','',''],'hoverlinkColor':['','','','','','','','','','','','','','','']}"
>
<fieldset hidden="true" name="fontsChooser_modal" repeat="true">
<field name="Elements"
label="TPL_SERENITY_FONTS_ELEMENTS_LABEL"
description="TPL_SERENITY_FONTS_ELEMENTS_DESC"
class="medium-input"
filter="html"
type="text"
default=''
/>
<field name="Weight"
label="TPL_SERENITY_FONTS_WEIGHT_LABEL"
description="TPL_SERENITY_FONTS_WEIGHT_DESC"
type="list"
default=''
>
<option value=''>- Select -</option>
<option value="normal">Normal</option>
<option value="bold">Bold</option>
<option value="bolder">Bolder</option>
<option value="lighter">Lighter</option>
<option value="100">100</option>
<option value="200">200</option>
<option value="300">300</option>
<option value="500">500</option>
<option value="600">600</option>
<option value="800">800</option>
<option value="900">900</option>
<option value="initial">Initial</option>
<option value="inherit">Inherit</option>
</field>
<field name="Style"
label="TPL_SERENITY_FONTS_STYLE_LABEL"
description="TPL_SERENITY_FONTS_STYLE_DESC"
class="small-input"
type="list"
default=''
>
<option value=''>- Select -</option>
<option value="normal">Normal</option>
<option value="italic">Italic</option>
<option value="oblique">Oblique</option>
<option value="initial">Initial</option>
<option value="inherit">Inherit</option>
</field>
</fieldset>
</field>
I realize repeatable is deprecated but it should still function properly at this point, per George
Steps to reproduce the issue
create a set of fields that are list type.
view the fields in admin you will see 2, one functions one doesn't.
Expected result
standard list form field

as in 3.6.x
Actual result
2 fields for each list field, one functional one none.

Also field row is NOT repeated.
System information (as much as possible)
Additional comments
I realize repeatable is deprecated but it should still function properly at this point, per George