Apple’s (AAPL) next iPhone could be delayed or released with major features disabled due to a number of software bugs that have sent the team responsible for building the device into a “sense of panic.”

According to Fast Company, which cited a source familiar with the matter, one of these software issues is linked to wireless charging. Apple’s latest flagship model, which is expected to cost more than $1,000, is believed to have been designed to enable users to charge batteries without having to plug in their phones. However, the separate charging device the phone will sit on is reportedly still not ready, even though the wireless charging components, provided by chipmaker Broadcom (AVGO), are said to be fully functional.

Fast Company’s source says that these software difficulties could lead Apple to ship the first phones with wireless charging hardware that doesn’t work. The plan, should Apple’s engineers not get the issue fixed in time, would be to activate the feature at a later date, similar to how it has done in the past with other hardware, such as Portrait Mode in the iPhone 7 Plus.

The new iPhone’s facial recognition technology might be in a similar situation. Earlier this month, rumors surfaced that the company plans to replace fingerprint scanning with more secure 3D facial recognition technology on its latest model. According to Fast Company’s source, Apple has yet to get these sensors to work reliably. (See also: Apple Wants Face Scanning to Replace Touch ID.)

The source is confident that Apple will find a way to get the 3D software working in time, but also warned that the iPhone could be released with sensors that don't work, meaning that users will have to wait for it to be activated later on with a software update.

Failing that, the other alternative is a delayed release date for the iPhone. Apple’s flagship phones are typically launched in September, although analysts have already questioned whether the company’s latest model will be ready in time, particularly given the sophisticated features expected. (See also: Pacific Crest: Sell Apple, Buy Alphabet.)

“Adding too many features appears to be backfiring, ” said Susquehanna Financial Group analyst Mehdi Hosseini to investors in a note reported on by Barron's. Analysts at Susquehanna and KeyBanc have heard that Apple is facing problems integrating finger print sensors into the iPhone 8 OLED display. Fast Company's source said the reports are "plausible" and added that "in all likelihood, the fingerprint sensor will be embedded under the display."

Want to learn how to invest?

Get a free 10 week email series that will teach you how to start investing.

Delivered twice a week, straight to your inbox.