Crashing apps on new devices running a new operating system are no surprise, but when it comes to Apple's (NASDAQ:AAPL) new iPhone 5s, the problem is occurring at a higher rate than with both the iPhone 5 and iPhone 5c, a new report says.

According to software flaw tracker Crittercism, the performance glitches on the iPhone 5s are caused mainly by the handset's 64-bit A7 processor, the 64-bit version of the iOS 7 and the exisitng 32-bit apps.

The apps running on the 64-bit iPhone 5s have a crash rate of 2 percent, compared to just under 1 percent on the iPhone 5 and iPhone 5c.

Crittercism CEO Andrew Levy told AllThingsD the most likely reason the iPhone 5s is seeing more apps crashes is that app developers could not test their products for compatibility with iOS 7 on the iPhone 5s during the beta testing period.

In addition, Apple released the beta versions of the iOS 7 for the 32-bit iPhones in June. When the new iPhone 5s came out later on, it was packed with a new 64-bit A7 chip and an M7 coprocessor.

The problem is not occurring on the equally new iPhone 5c as its internals are nearly identical to the iPhone 5's.

However, Levy said Apple has done "a pretty good job of making a major transition" from iOS 6 to iOS 7 as the design shift is nearly invisible. He pointed to the desktop PC's shift to a 64-bit architecture, and said the developers were made to write new drivers and other code to help that transition.

“The good news is that Apple is certainly aware of issues,” Levy said. “Apple is doing a really good job of addressing these issues as they come up.”

According to another report from iDownloadBlog, if not managed properly, the transition from 32-bit to 64-bit processing may lead to increased memory consumption, which can affect apps' performance.

Meanwhile, many users of the iPhone 5s have reported an error, named "Blue Screen Of Death," which causes device reboots after the sceen goes entirely blue for a moment. The issue is apparently related to iWork apps, which come free with new iOS devices.