When you are near any Czech infantry unit, he holds the gun currectly, or in other words: The gun sticks in his hands.
But if you go at distance, the gun basically teleport right next to the Czech infantry unit. It only happens with Czech infantry units.
Check the album: https://imgur.com/a/ao2o1TU
first two screenshots shows the correct holding, while the last screenshot shows how at a certain distance the weapons teleport right next to the infantry
Is reproducable with Zeus