We have had 2 Builds so far stuck archiving. Both indicate in their logs that Build Archive took a normal amount of time (9m and 19m) but the step Archive - iOS never finished. One of them ran for more than 6 days until we noticed and canceled it. The other one ran for 18 hours, and also had to be canceled manually. They were in two different projects, with no significant changes. The first build ran on Xcode 16.4 (16F6) and macOS Sequoia 15.6 (24G84), which we had had no issues like this with until just now, and the second ran on Xcode 26 (17A324) and macOS Tahoe 26 (25A354). We tested our app on the newest Xcode version and had no issues.
Submitted report using feedback assistant: FB20279737.