Developer Hits MQTT Value Template Bug Triggering Alerts on Every Message

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A developer encountered an unexpected behavior in MQTT where the value_template filter failed to work as intended. Instead of selectively triggering on specific messages, the wait or automation fired on every incoming MQTT message. The issue appeared to stem from how the value_template condition was being evaluated within the MQTT integration. The developer documented the bug and shared findings on DEV Community to help others facing similar filtering problems. The root cause pointed to a misunderstanding or flaw in how MQTT processes template-based filtering logic.

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