Vuforia SDK Version: 6-2-10 - Description with steps to reproduce: Switching between Marker (HANDHELD_AR) and Markerless (ROTATIONAL_HANDHELD_AR) tracking is not working properly.
Case 1: When the app is started, if the Marker tracking is activated first, and then it is switched to Markerless tracking - it works. The camera rotates according to the device orientation.
Case 2: When the app is started and the Markerless tracking is activated first, it appears that the Vuforia plug-in is not doing any tracking (the camera is not rotating). After that, if you switch to Marker tracking, the marker is found, but the camera is still not moving. In any case, the autofocus script appears to stop working when switching to Markerless tracking.
Materials:
https://drive.google.com/open?id=0Bxca08o84f5lYlcxY1B2U2NLMHM
1) VuforiaController - Script used for switching between modes. - Development OS (Mac OS X, Windows, Linux): Windows 10 - Mobile OS and Version: Android 6.0.1; Android 7.0 - Mobile Device Manufacturer and Model name: Lenovo Phab 2 Pro; HTC 10; - Do the Vuforia Sample Applications show the same behavior?: This particular case is not included in the samples.