Under certain unknown circumstances the Shelldiver can get stuck in its attack animation/jumping process.

https://i.ibb.co/Tws3jLX/1485590-20231020111422-1.png

It stood still in that situation seen in the screenshot, leading to a certain kill when the glitch happened. 

Everything went smoothly as usual. Just at one point when Shelldiver started the jump it stopped.

The spawners and the other monsters worked normal, so did the heroes and crystal bot. Only Shelldiver was frozen in that animation position.

I could not make out a specific trigger for it as in: I did not hit or done something special when it happened. Only affected object entity was Shelldiver.

From Steam: https://steamcommunity.com/app/1485590/discussions/2/3877095200005165355/