You can not select the 'Time' section in 'Date and Time' fields by‘Tab key with New form rendering engine.

When New form rendering engine is turned on, you can't use 'Tab' key to select the 'Time' section in 'Date and Time' fields.

Repro steps
1. Select 'Date and Time' fields by using 'Tab' key
2. Then you can select 'Date' section.
3. After you populate 'Date' section, press 'Tab' key does not move to 'Time' section, it selects next field in form

This only happens when New form rendering engine is turned on in Dynamics CRM Online 8.0 and 8.1.
So please fix this behavior.

Product Version：8.1/8.0