As anticipation builds for Apple’s next-generation iPhone 5S, a new report suggests Apple will once again have trouble meeting early demand for the new phone. KGI Securities analyst Ming-chi Kuo has a good track record when it comes to details surrounding unannounced Apple products, and he reported in a research note on Tuesday that manufacturing issues will leave the iPhone 5S in short supply when it launches in late September.

Kuo didn’t elaborate, though an earlier report claimed the production issues are related to the iPhone 5S’s new fingerprint scanner. Supply is expected to pick up in October and November, according to Kuo’s note.

The analyst also said that Apple’s entry-level plastic iPhone will launch later this year, but he claims Apple will not launch a new iPad mini model alongside the overhauled fifth-generation full-size iPad. Instead, he claims Apple will debut two new iPad mini models in 2014, a high-end Retina iPad mini and a cheaper update to the current model.