Apple initially shipped the update on Tuesday alongside iOS 12.1, but it quickly pulled it hours later following reports that it bricked some Series 4 watches. A number of customers affected took to Reddit and Twitter to warn of the issues, which were first reported by 9to5Mac and caused some watches to be stuck on the loading screen.

The update is no longer available, but Apple told those who did download it and now have bricked a watch that it is working on a fix that’ll ship as soon as possible.

“Due to a small number of Apple Watch customers experiencing an issue while installing watchOS 5.1 today, we’ve pulled back the software update as a precaution,” it said in a statement. “Any customers impacted should contact AppleCare, but no action is required if the update installed successfully. We are working on a fix for an upcoming software update.”

The Watch drama comes less than 24 hours after Apple unveiled a new and larger version of the iPad Pro and a revamped MacBook Air model at an event in New York. Other goodies revealed included a new Mac Mini, a magnetic Apple Pencil and an expansion to its “Today at Apple” program. Next up is the company’s earnings on Thursday, although affected Watch owners will hope that the patched WatchOS update arrives sooner.