There are multiple glitches/bugs involving the dino tamer and his ultimate.
1. If you have pyrodisk equipped and you cancel it or your ultimate ends, the pyrodisk remains where the ultimate ended.
2. If you throw a bomb while using the ultimate and the ultimate ends before the bomb hits, the bomb disappears and does no damage.
3. If you are in a inventory menu (loot collector, materials tab, etc.) and the dino tamer's ultimate ends, you are sent to the top of the menu.