When Pythion Rezzes a character (in this case King Gillcaron) the character does not change to the "live" character model. The Health bar and buff icons are present but, the character is still layed out on the ground. When changing between waves, the "dead" character will slide across the ground to the new group position. 

Character will even tually "appear" as a "live" model state during one of their turns and continue on as normal.

This was in Nightmare campaign mode. 

Screenshots attached of during and after issue, along with DXDIAG of box used.

This was on Plarium Play Build:   2023 © Plarium Play v8.2.0-0.0.0 (3.179) 

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Hope that helps.