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same issue is currently followed here :
https://www.googlenestcommunity.com/t5/Speakers-and-Displays/Sleep-sense-cant-calibrate/m-p/362783/emcs_t/S2h8ZW1haWx8dG9waWNfc3Vic2NyaXB0aW9ufExFOFlTMjhFMVNKVTV8MzYyNzgzfFNVQlNDUklQVElPTlN8aEs#M67552