TouchUI Coral3 CheckBox in Mulitifield reading/storing values incorrectly

[marto]

Required Information

• AEM Version, including Service Packs, Cumulative Fix Packs, etc: AEM v6.4.3
• ACS AEM Commons Version: 4.2.3-SNAP and 3.x versions
• Reproducible on Latest? yes

Expected Behavior

In Touch UI, when using a coral3 checkbox inside a mulifield that has been configured to use acs-commons-nested="JSON_STORE", the value of the object is stored in JSON as a "true" or "false" string instead of a boolean primitive. This is incompatible with the classic UI equivalent that stores the values as primitives and causes the loaded value to not be reflected correctly nor storing the value correctly.

Actual Behavior

We expect the value to be loaded correctly (i.e checkbox checked) when the data is:
./myCopositeField = {myCheckbox: true, myOtherField: "blar" }, currently the checkbox is unchecked.

We expect the value to be stored as a boolean and not a string: eg: ./myCopositeField = {myCheckbox: true, myOtherField: "blar" } and not ./myCopositeField = {myCheckbox: "true", myOtherField: "blar" }

Steps to Reproduce

Setup a multifield in touch UI and classic. The checkbox should read and write consistently between both UIs.