The iPhone 15 Pro and 15 Pro Max are no longer expected to come with solid-state volume and power buttons, reputable analyst Ming-Chi Kuo said today in a post on Medium.

Apple’s next Pro iPhone lineup was widely expected to drop physical buttons in favor of capacitive solid-state ones that would either be swipe-activated or pressure-sensitive. This may not materialize, however, as Kuo explains that “unresolved technical issues” have ultimately led Apple to shelve its plans, forcing it to “revert to the traditional physical button design.”

The iPhone 15 Pro and 15 Pro Max are currently in the EVT development stage, adds Kuo. Apple and its partners should have minimal impact on planned mass production as “there is still time to modify the design.” Kuo did not clarify whether the mute switch is also expected to be retained in lieu of the reported “action button.”

Kuo explains that the recent development should significantly impact two of Apple’s suppliers. Cirrus Logic and AAC Technologies are set to miss out on revenue from orders for controller ICs and extra Taptic Engine modules, respectively.