The mantling animation prevents them from firing, and that causes them to lose the gunfight. You can see how that might feel bad. As a way to fix this, Treyarch have added an Auto Mantle toggle in the game's controls menu that changes the way that mantling works.

What does mantling mean in cod?

Mantling. Across all modes in Modern Warfare, there may be times where you need to get over a box, ledge, or ridge. That's where mantling comes into play; pressing cross when prompted near a grabbable edge will allow your Operator to boost up and over, or on top of the object in question.

What does Mantle mean in Cold War?

Cross – Jump/Stand/Mantle: Jump across gaps, mantle over lower objects such as barriers or windowsills, and climb certain scenery using this button. The height of your jump may be influenced by your speed and the number of successive jumps you've taken. You can also use this button while crouching or prone to stand up.