Good job finding the bill in question, and thanks for the sources!

You’re right - this is the key part that is being misrepresented, I think:

Provisions prohibiting the employer from maintaining policies that require employees to confront active shooters or suspected shoplifters

So the law is actually intended to prevent employers from requiring employees to confront shoplifters or active shooters, which makes much more sense. That’s not the same thing as making the act of stopping the shoplifters illegal, per se.