I believe this is an Unreal Engine bug. I’ve reported it to Epic and it should be fixed in the next release. In the meantime, there’s a workaround here:
Just an update on the best workaround here… FORCE_ANSI_ALLOCATOR may not work well in the latest UE versions, and even if it does it may have unintended consequences (such as a reduction in performance).
Instead, I now recommend that you make a change to a script in the Xcode project. If you open Intermediate/ProjectFiles/[project name] (IOS).xcodeproj/project.pbxproj, you’ll see a section like this:
ED01E0DF7686EEC1CE350CF9 /* Generate dsym for archive, and strip */ = {
isa = PBXShellSc…