Problems with champing

A problem, or maybe two different problems, occurs during the war season with champing. First, the game sometimes doesn’t allow you to champ players. Second, the game changes shield to champ. The last one is kinda funny (or even hilarious) to a certain degree ?, but very problematic at the same time during hard wars.

We also have this same issue. 2 fights,   against same alliance,  we tried champing one fight, 6 champs work ,2 shielded ,we tried champing only, 

Other fight, nothing works, try to champ ,game crashes.

Wasted our gold,an time