Google Analytics - Impression on utag.link - listname is not correct

[astoundcommerc2]

Hello All,

I am setting up tracking for impression like below,

Next step mapping of all the eec variables:

Created an extension which will get the values for all impression related data like impression_id, impression_name, impression_brand, impression_list_name etc and sending utag.link for GA trigger as below

In the debuggin I have all the data ok in data object.

As shown below

In the actual GA call I have impression data like this, basically list_name is repeating for every impression.

Any suggestion would really help here. Thanks