After migrating a Unity 2022 project to Unity 6 (6000.0.23f1), we encountered an issue with early calls to UnityPlayer.UnitySendMessage(...) from native Java code during app startup. These calls, which worked fine in previous versions, now cause a crash in Unity 6 with a null pointer dereference error (SIGSEGV).
I don’t have access to the portal ticket—has there been any discussion there? We are encountering the same issue, and delaying (even up to 10 seconds) doesn’t seem to resolve the issue.