On Monday, Microsoft released a preview version of the new Windows 10 Mobile OS to members of its Fast Ring Insider program. The software distributed for testing has the build number 10536. However, the company did not expect that it will break some phones during the process.

Microsoft already acknowledged the issue and indicated that a fix is in the works. Gabe Aul, Head of Windows Insider Program for Windows 10, recently took to Twitter and mentioned that the software giant is currently working to address it.

The aforementioned Windows 10 Mobile build was only intended to support certain Lumia models. The problem arises when the "detectoids," which are meant to detect unsupported devices, fail to perform their task. As a result, other incompatible devices were allowed to download and install the software. It then turned out that doing so will render their devices unusable.

Aul said via his official Twitter account that, "There was a problem with detectoids (yes, that's a real thing) allowing non-supported phones to select the build." He added that the glitch mostly affected HTC 8X and BLU handsets.

The Microsoft executive assured affected Fast Ring Insiders that his division will soon provide repair options to fix the bug. "We're working on repair options for the devices that were not supported but got the latest build. This is a high priority for us to solve and have a team dedicated to it. We will let you know as soon as we have info on recovery,"Aul explained.

He also warned owners of devices excluded in the list of supported models not to download the software. Installing the latest mobile build on an unsupported device would essentially break the handset and can only be fixed by re-flashing back it to factory image, according to Aul.

Apart from this unforeseen glitch, the same build 10536 brought other major features such as an updated Photos app and the new One-Hand Mode along with a handful of fixes to bugs found on the previous build. The Windows 10 Mobile OS also seems to be approaching its final development stage.

The company has a big event slated for October 6 where it is expected to launch the much rumored Lumia 950 and Lumia 950 XL flagship smartphones, which are both said to run the final version of Windows 10 Mobile. Microsoft is also predicted to announce the release date of its new mobile OS to Windows Phone devices from other manufacturers on the same event.