Null Error - Firebase Query Filtering

Did Flutter Flow Change anything in recent update related to firestore queries & null return values? I am getting a Null / No Element error:

1. Sort List items - Based on Edited time (this field exists)

2. Filter List Items - stripe_subscription_plan_id (Firebase doc field) == BasicPlanMontlyStripe (Project Constant)

3. Item at Index - Last : Here is where we get a Null value, as filter returns no matching documents in the Subscribers collection from point 2) above

4. Get Document Property - stripe_failure_code - this will not be executed since there was no item at index last

How do I handle the above scenario. I would like to check if there is any document with the filter as described in point 2 & then check if it has a stripe_failure_code field which is populated