Iteration through Basic Trigger bundles

What are you trying to achieve?

Hello,

I want to set some values and make an API Call for each one, mapping each value for each API Call.
How can I do it? When using Basic Trigger it produces Bundles but how to map them? Scenario tries to iterate but it fails on the second iteration, as the value is empty.
First iteration works as expected.

This is my output bundle:

[
{
“a”: “11”
},
{
“b”: “13”
},
{
“c”: “15”
}
]