To resolve the behavior replace the current module.framework.properties.org.osgi.framework.bootdelegation configuration in portal.ext-properties to the following.
module.framework.properties.org.osgi.framework.bootdelegation=\
__redirected,\
com.liferay.expando.kernel.model,\
com.liferay.glowroot.plugin.*,\
com.liferay.portal.servlet.delegate,\
com.liferay.portal.servlet.delegate*,\
com.sun.ccpp,\
com.sun.ccpp.*,\
com.sun.crypto.*,\
com.sun.image.*,\
com.sun.imageio.plugins.*,\
com.sun.jmx.*,\
com.sun.jndi.*,\
com.sun.mail.*,\
com.sun.management.*,\
com.sun.media.*,\
com.sun.msv.*,\
com.sun.org.*,\
com.sun.tools.*,\
com.sun.xml.*,\
com.yourkit.*,\
jdk.*,\
org.apache.el,\
org.apache.el.*,\
org.glowroot.agent,\
org.glowroot.agent.*,\
sun.*,\
weblogic.jndi,\
weblogic.jndi.*
org.apache.el,\
org.apache.el.*,\