There are still unused tracks/key frames in some models (you need to sanity check all models carefully) and also some model have extremely buggy geoset animation properties and/or extents.
Please go through all models carefully one by one.
🔨 Hive's 3D Viewer has been updated! 🔨 It now supports MDX1100 which should fix a lot of issues when viewing HD models in our 3D Viewer. We encourage you to check it out for yourself and report any issues you find in the Site Discussion board.