API exception not returned in production environment

bugs
1

If there is an exception returned from a transformation like his:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
	xmlns:AS="http://schema.advantages.cz/AsapFunctions"
	xmlns:date="http://exslt.org/dates-and-times" exclude-result-prefixes="AS date">

	<xsl:include href="model://e1c65fcd-118d-4eb3-9c2f-aa27fec132ba"/>

	<xsl:template match="ROOT">
		<RuleExceptionDataCollection xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
			<xsl:if test="1 = 1">
				<xsl:call-template name="Exception">
					<xsl:with-param name="FieldName"><xsl:value-of select="'Test'"/></xsl:with-param>
					<xsl:with-param name="EntityName"><xsl:value-of select="'WorkQueueEntry'"/></xsl:with-param>
					<xsl:with-param name="Message"><xsl:value-of select="AS:GetString('TestError')"/></xsl:with-param>
					<xsl:with-param name="Severity"><xsl:value-of select="'High'"/></xsl:with-param>
					<xsl:with-param name="HttpStatusCode"><xsl:value-of select="402"/></xsl:with-param>
				</xsl:call-template>
			</xsl:if>
		</RuleExceptionDataCollection>
	</xsl:template>
</xsl:stylesheet>

It is not returned in the API response. It is replaced with a generic error message instead. This happens in production environment only.

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