Business Key not visible on tasklist filter

I have a custom tasklist filter where I want to display some variables given below:

The setup of the form variables is as follows:


But when I start the process instance, I see that in the tasklist from the filter I created, I am unable to see the value of name
image

When I remove name as Business Key, I am able to see it in the tasklist again?

What is the problem here? Why can’t business keys be shown in the tasklist filter in this manner?

My camunda platform version is 7.14 CE

EDIT:
Changing the filter to -


did not work either