Variable empty when unsing Set variables, but not in get?

Hi there, I am trying to replace a variable, however for some reason the initial value for the variable is empty, even though it is set correctly, when I review it in Get multiple variables.

Setting the initial value. Works just fine.


Validating that the variable can be queried and is set correctly (only using this step for debugging)

When I want to change the variable value though, the variable input is empty.

This is the whole flow, so I am unsure why the variable value gets lost.