Based on the information provided, we suspect this issue could be related to intermittent network latency, a temporary slowdown in the API response, or transient Azure infrastructure behavior at that time. While there were no service health notifications, we recommend manually testing the API at 1:15 AM UTC to check for response delays.
Additionally, reviewing the Logic App run history for execution duration and checking the API logs at that time may provide more insights. Let us know if you observe any patterns or need further assistance in troubleshooting this issue.