So, has something changed after betas that we should be aware of because apps built for mixed reality portal doesn’t seem to launch in MR mode anymore? We tested 2017.2b6, b7 and b8 where the builds actually work as they should but after upgrading to rc versions with these 2017.2f1 and f2, apps just start as a normal UWP app?
Perhaps this, from b9?
“Windows Mixed Reality is now only supported when running Windows Fall Creators Update (RS3). This would previously work on RS2 builds, but this configuration is no longer supported.”