Select float not updating animation

I’m working on a vr multiplayer game, and for debugging I’m using normal gameplay, so in my animation blueprint I have a boolean which can enable or disable VR, if VR is enabled it will use the position of the controllers as IK for the hands, if disabled it will use animations.
I have a select float to set the alpha of the IK, but when I change it during gameplay it doesn’t work. It does work if I change the default value though. Why can’t I change the select float during gameplay?

I did test with a print screen and the replication does work