The success of "/function #tag" is inconsistent when the number of functions in the tag changes

If there's only one function in the tag:

• If there's no /return command: The "/function #tag" is void, having no success value.

• Otherwise: The success of "/function #tag" is whether the /return command in the function returns a failure or success.

If there're multiple functions in the tag:

• If there's no /return command in any function: The "/function #tag" is void, having no success value.

• Otherwise: The success of "/function #tag" is always true. ❌

How to reproduce:

1. Download and enable the attached data pack. In which, there're two functions and three tags. The two functions (a, b) are exactly the same, and both return a failure with a /return command. The three tags include function a, b, a&b, respectively.

2. Run /execute store success storage name path int 1 run function #a

3. Run /data get storage name path

4. ✔ Found that it's 0. Because the /return returns a failure.

5. Run /execute store success storage name path int 1 run function #b

6. Run /data get storage name path

7. ✔ Found that it's 0. Because the /return returns a failure.

8. Run /execute store success storage name path int 1 run function #anb

9. Run /data get storage name path

10. ❌ Found that it's 1. Though both /return commands return a failure.

Expected behaviors:

Since both three commands above invoke a function tag, they should have consistent success value. Always true makes the success value (of tags that have more than one functions) useless.