Missing Units

Hi, Cactus here. Today I stepped on a rock, and is very rare.
See this Image:

This unit is from my hack, and until now, is the only cavalier.

Leaving details of the game aside, look at the gameplay when I tested this part.

This is rare, I put him in the unit placer, and now, it does not appear.
What is going on? How is this possible?
Please, help this missing cavalier to return with his comrades, please.

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