Using /effect give command in creative mode, will give the incorrect value.

Put the summary of the bug you're having here

What I expected to happen was...:
To give the specified value in the /effect give command.

What actually happened was...:
Instead of the specified value the effect power given will always be one more.

Steps to Reproduce:
1. Open a creative mode world or survival world with commands activated
2. Use the /effect give command. ex: /effect give @s haste infinite 1 true.