Either you're being detained, in which case the law says you're allowed to record your own detainment, or you're not being detained, in which case you're allowed to walk away. In no case does this law give the police an extra reason to detain you if you walk away while they walk toward you.

If police are going to make up something bogus like arresting you because you're giving them space, they can do that regardless of this new law. This new law doesn't make it worse.