Are you a fan of Apple watch? There is a caution for you -- a bug is discovered in Apple Watch Series 4, crashing the device and causing it to get stuck on re-boot loops. The "Activity" feature is responsible for sketching a timeline graph of the current day, showing hour-by-hour data for calories, exercise minutes and stand hours, said a report. 
 
According to 9To5Mac report, the Watch reboots itself repeatedly, as long as the `Infograph Modular` face is active with the `Activity` complication. The watch tries to load the complications again, but fails and restarts, continuing indefinitely until the watch runs out of power, the report added.
 
The "Activity" feature is responsible for sketching a timeline graph, hour-by-hour data for calories, exercise minutes and stand hours. In Australia people have experienced the change in daylight saving time. The maximum complaints are coming from this country only.
 
Apple Watch Series 4 comes with support to track heartbeat data, heart rhythm and notify users. However, the US tech giant is yet to update any software to resolve the issue.
 
Notably, Apple Watch Series 4 was introduced and redesigned and re-engineered to help customers stay active, healthy and connected. However, with this problem the users have been disappointed.