Lyra: failing to set Max Walking Speed

Hello,

Max speed of some characters in Lyra was decreased following discussion at How to make a " Set " node max walk speed
like this:

In this example the Max Walking Speed value was made very low - 0.5 m/s - to spot if it has any effect . Seems it does not, targeted characters continue to run similar to those whose speed was not changed.

What may be wrong, please?
Thank you!

Advice was received from outside of Unreal Engine forums - the default character speed may be changed in “B_Hero_Default”, affects all characters in Lyra game.