When I switch to 'Split Form' (default view = 5) from Single Form, only the datasheet portion is designed to display. Once the Split Form is displayed, the cursor lands on the same control, as programmed. However, there is no blinking cursor.

Pressing Enter or Tab should take the cursor to the next field to the right.
I can see that Enter or Tab follow the keyboard behavior programmed for 'Single Form', so the standard keyboard behavior is somehow overriden.

By the way, the spacebar or F2 key do not work on any control, which would have made this easier to resolve by using some Sendkeys actions.

I found that a mouse click on any field brings back standard navigation!
If someone knows how to send a mouse click without user intervention to an Split Form control, this thread is waiting for the answer.