Fitbit tells some Sense owners to return watch over ECG issue

Fitbit Sense, the company’s wearable with advanced health-tracking features like ECG and SpO2, is the subject of a new email advising some owners to return their watches for a replacement. The reason, according to Fitbit, is a hardware issue that may affect the device’s functionality, necessitating a replacement with a fully-functional unit. The issue came to light when some Fitbit …