I have had this issue for a while. Sometimes when my voice to text (STT) is translated (using faster-whisper) correctly. The internal HAS voice text processing is not executed, instead the LLM is. Below setting timer for the same text does not execute the first attempt. Any idea why?
The timers are on each voice device, not in HA. AFAIK, there are no built in intents to handle timer entities within HA.
The really weird thing is, if there is a timer instantiated on one of your voice devices, you can use the Assist text tool to run all the intents that modify it i.e HassCancelAllTimers, HassCancelTimer, HassIncreaseTimer, HassDecreaseTimer, HassPauseTimer, HassUnpauseTimer, HassTimerStatus.