The workaround of using .toolbarRole(.automatic) in DocumentGroup to avoid the double back button no longer works on Xcode 16.3 + iOS 18.4 and above.
After cross-testing, here are the results:
Xcode 16.3 + iOS 18.5 = Issue present
Xcode 16.3 + iOS 18.4 = Issue present
Xcode 16.3 + iOS 18.3 = Successfully avoids double back button
Xcode 16.2 + iOS 18.5 = Successfully avoids double back button
Xcode 16.2 + iOS 18.4 = Successfully avoids double back button
Xcode 16.2 + iOS 18.3 = Successfully avoids double back button