Apple's newly released iOS 9.1 has been reported to have a minor, yet irritating bug in it.

Apple was heaped with lots of praise by tech critics and fans for the release of iOS 9.1, which has been touted as the fastest ever rollout of a major update by the company. It took just a little over a month to deploy and came with a slew of fixes, apart from value added features that included more than 150 plus new Emojis.

The company had released five beta versions to developers and was expected to roll out few more before the deployment of the public version.

Read more: Apple iOS 9.1 released; patches Pangu iOS9 jailbreak, multiple bug-fixes [complete change-log details]

Now, Apple's move to introduce a new update in record time seems to be have backfired, as some early adopters of new iOS 9.1 are complaining that their devices' alarm app has stopped working, resulting many to miss early morning office meetings, flights and other appointments, reported Forbes.

Angry Apple device owners took to Twitter and other social media platforms to vent their anger over the iOS 9.1 Alarm bug.

Among them, high profile celebrity Joey Santiago (Pixies' guitarist) too faced this glitch. His iPhone failed to ring the alarm in the morning.

Apple iOS 9.1 Alarm bug

It has to be noted that not all Apple iPhone and iPad owners running iOS 9.1 are facing this issue. It is too early to assume that there is some kind of an inherent glitch in iOS9.1. There are also chances of a hardware problem in certain devices; it could also be possible that some users might have absent-mindedly switched off their alarm notification.

As of now, Apple is yet to respond to the media. 

In a related development, Apple has stopped signing for iOS 9.0.2, thus closing the back-door option even for tech-savvy users, who otherwise could have downgraded from iOS 9.1 to v9.0.2.

Apple had released two minor incremental updates v9.0.1 and v9.0.2 to fix some bugs and stability improvements, which required immediate attention during the trial period of iOS v9.1.

Similarly, the company is likely to release a software patch v9.1.1 before the second major update v9.2, which is expected to get rolled out anytime between December 2015 and January 2016.