The dynamic-extended-choice-paremeter plugin implements custom markup similar to the one of the f:checkbox widget that may break with the tables-to-divs changes: https://github.com/jenkinsci/dynamic-extended-choice-parameter-plugin/blob/master/src/main/resources/com/moded/extendedchoiceparameter/ExtendedChoiceParameterDefinition/checkboxContent.jelly

It should be reviewed and fixed if needed.