An active 'priority' investigation is being continuously conducted by the U.S. Consumer Product Safety Commission (CPSC)in order to suitably determine why a replacement Galaxy Note 7 was deemed safe.

The CPSC is the federal agency overseeing the U.S. recall of the Note 7.

According to USA Today, a Samsung Galaxy Note 7, the latest offer of Samsung that has been recalled for overheating batteries, began popping and smoking on October 05 morning aboard a Southwest Airlines.

It caused the evacuation of the flight while still on the ground at Louisville.

This instance purportedly brought more damage to Samsung's reputation and calls into question the very future of the Note 7 itself.

To aggravate matters, the device was purported to be one of the replacement handsets that the South Korean tech giant company had previously deemed safe. In view of the same, it appears that the issue is far from settled.

The CPSC said that it is investigating the Southwest flight incident, according to a report on news site Recode.

The timing is dreadful for Samsung since the incident happened a day after Google unveiled its own brand new Pixel handsets.

Since Pixel has taken another smartphone craze in the tech world, this might threaten Samsung's dominant position among premium Android smartphones. Samsung must still contend with Apple, which recently launched the iPhone 7.

No timeframe was given on when there might be a resolution of the matter and the CPSC wouldn't say if it has the Note 7 that was on the Southwest flight or any other replacement phones whose batteries may be overheating and possibly posing a safety risk, as reported by The USA Today.

Samsung, which is cooperating with the ongoing investigation, said that they are probing the case to determine the cause and will accordingly share findings as soon as possible.

"We remain in close contact with the CPSC throughout this process," the company said.

"If we conclude a safety issue exists, we will work with the CPSC to take immediate steps to address the situation,"Samsung added.