Physical Animation Strength Multiplier does not update (CPP)

I’m trying to implement some kind of hit reaction with physical animation component. When character hit, script updates physical animation strength via SetStrengthMultiplyer function. I set 0.25f. Then a timeline starts and updates strength to value 1. But while timeline process, skeletal mesh collisions does not affected. When timeline finishes, strength is set 1 again and it looks fine.