Data not being populated in script task

Hello,

I have a process for parsing data, and in one of the nodes, I'm checking whether the respective alert exists for a specific event. The script task has one output, which uses a QR rule to retrieve the alert based on the event's alert ID. The retrieved alert is then stored in another variable. The QR rule returns a single alert, which works as expected in all other environments, but in production, the result is null in the process model.

This issue has also occurred with other processes using the same rule and having multiple outputs, but when we split the logic into two subtasks, it worked fine. However, for this process, the problem persists. Could you suggest what might be causing this issue?