Debug messsages getting logged despite "debug" level being disabled

Problem/Motivation

Log messages are being logged despite the "debug" log level is disabled in settings.

Example:

Drupal\billwerk_subscriptions\Api::get: Sending GET request to https://app.billwerk.com/api/v1/contracts/123456789/Subscriptions. Status 200 "OK". Result size in bytes: 274
Caller: /web/modules/contrib/billwerk_subscriptions/src/Api.php:1104:get:Drupal\billwerk_subscriptions\Api:->

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes