Samsung the past two years has unveiled and subsequently launched its Galaxy Note flagship smartphone a couple of months early in an effort to hit the market before Apple’s iPhones that traditionally launch in mid-September.

The strategy has worked thus far but has it come at the expense of quality control?

Samsung on Wednesday told Reuters that shipments of the Galaxy Note 7 are being delayed due to additional tests being conducted for product quality. The representative didn’t elaborate on what it is specifically testing for nor did they say which markets would be impacted by the delay.

The publication points out that local media reports claim some users have had the battery in their phones explode. If the aforementioned delay is indeed related to some sort of battery defect, it could deal a major blow to Samsung’s outlook for the second half of the year.

Samsung isn’t the only handset maker facing potential quality control issues. Just the other day, Apple fielded a lawsuit from a trio of plaintiffs regarding a phenomenon that’s become known as Touch Disease. The plaintiffs are hoping to elevate the case to a nationwide, class-action suite.

How this will all play out remains to be seen and in fact, it may not be Samsung’s fault at all. Apple Insider notes that initial reports suggested the culprit may be non-Samsung (third-party) USB Type-C charging cables. That’s entirely possible as all cables aren’t created equally (just as Google engineer Benson Leung).