It's said that owners of the new model in Australia have been experiencing crashes and reboots due to a bug in the Infrograph Activity complication, which has resulted in the device getting stuck in a reboot loop.
As reported by 9to5Mac, users impacted by this can either wait until it corrects itself tomorrow, or attempt to remove the complication from the Watch app on the iPhone.
It adds that the activity complication maps hour-by-hour data on things such as calories burned and exercise time, and the missing hour due to DST has confused the new Apple Watch.
There is still enough time for Apple to issue a fix for other regions, given that Europe will move off DST at the end of the month, with the US following on November 4.
There is also a chance that the company's smart watch could handle the different DST - going back an hour instead of forward - in the US and Europe in a better way.