1.

currentRecord

will not have any field-level data populated when the user is Viewing a record. You will need to

load

or

search

for the data if you need it in View mode. You can detect the mode in your User Event using

scriptContext.type

, but there is no similar mechanism within the Client Script 2. Fields will return

undefined

if they are empty or if you have the wrong field ID. Make sure the values are populated and the field IDs are the same in both environments.