The issue with Square apps crashing on some devices running iOS 18.4 has been resolved with the latest version of Square Apps available in the App Store.

Please update your Square apps to the latest version before updating your device to iOS 18.4, to ensure uninterrupted use of Square. 

We can confirm that the previously released fix addressing the issue affecting Payment Links has been successful, and we've seen no further issues since our last update. We appreciate your patience as we worked to resolve this issue.

We have released a fix for the previous issue impacting some Transactions, Refunds and KDS data delays, and services have been in a state of full functionality for the last hour. We recommend Sellers re-attempt any failed transactions and refunds. Our Engineering team is actively discussing how to prevent future disruptions like this one. Thank you for your patience with us as we worked to resolve this issue.