Posted on 31-08-2018 01:23AM
This is result of jquery conflict with any third party plugin. to figure that out , deactivate all other plugins except this and woocommerce and activate each one by one and test. once you find the conflicting plugin, you can deactivate that plugin for some time whenever you want to make changes related to checkout fields. once changes are done , you can reactivate that plugin. it won�t affect the frontend functionality.