When using the "Upcoming Creator Features" option, the new execute format does not get used for functions in behavior packs.

Steps to Reproduce:

1. Create A World With "Upcoming Creator Features Enabled"
2. Create A Basic Behavior Pack With A Function. This Function Should Use Any Execute Command (New Format)
3. Attempt To Load Pack In Game

Observed Results:

Error Is Thrown And Function Is Not Used

Expected Results:

Pack Should Use New Execute Format

Screenshots/Videos:

The Pack Has Been Attached To The Report.