Dude. Why did you up and change everything? Why did you move the code to the animation blueprint? That wasn’t even a problem.
Print String is the best problem solving tool you have. I asked you to setup code to see if the bool was changing on the client or not, then you can figure out if there is a logic problem in your animator or if the variable isn’t replicating correctly. I’ve spent enough time as it is trying to help and typing up a giant thing to just have you ignore what I said.