I am able to fight enemies normally until their HP is low enough that the next blow will kill them. When I strike what would be a killing blow, the enemy doesn't die. Damage numbers and blood sprites continue to appear, but the weapon animation does not, and the sidebar text does not update. The sidebar text does update normally if I miss, am blocked, do non-fatal amounts of damage, or take any other action.

How often does this happen? Do the enemies attack back, or just stand there? What weapon are you using?

Yes the enemies fight back, It has happened to me a few time, It has fixed itself by reloading the save, but it has happened a few times to me.

It happens for me with every weapon, on every enemy, and cannot be fixed by reloading the save or quitting and re-starting Axu.

The problem only occurs with certain saves. If I start a new game, the problem goes away. However, it's now shown up again in a second saved game.