Steps to reproduce the issue

When called in a fields group a showon wich call over this group don't run
In J3 it was correct

Exemple :
<field
name="chrono_live"
type="radio"
class="btn-group btn-group-yesno"
label="COM_GSKIEPREUVES_CHRONOLIVE_LABEL"
description="COM_GSKIEPREUVES_CHRONOLIVE_DESC"
value="1"
default="0"
>
<option value="1">JYES</option>
<option value="0">JNO</option>
</field>

		<fields name="chrono_params" > 
			<field 
				name="live_typeclt" 
				type="list" 
				default="off" 
				class="grp-chrono-live"
				id="live_typeclt"  
				label="COM_GSKIEPREUVES_CHRONOLIVE_TYPECLT_LABEL" 
				description="COM_GSKIEPREUVES_CHRONOLIVE_TYPECLT_DESC"
				showon="chrono_live:1"
				>
  				<option value="off">COM_GSKIEPREUVES_CHRONOLIVE_TYPECLT_OPTION_OFF</option>
  				<option value="mch">COM_GSKIEPREUVES_CHRONOLIVE_TYPECLT_OPTION_MCH</option>
			</field>
			
		</fields>
		<field 
			name="chrono_live_info"
			type="note"
			class="grp-chrono-live alert alert-info" 
			label="COM_GSKIEPREUVES_CHRONOLIVEINFO_LABEL" 
			description="COM_GSKIEPREUVES_CHRONOLIVEINFO_DESC"
			showon="chrono_live:1"
		 />

The showon of named fiel live_typeclt don't run.