I dont understand why this is happening. (It's me agian margret. hehe )

Can any one tell me why no one on the other team goes by the rules of the sneak skill. Cant figure this one out. It's about the 3rd time I have seen it while playing the last couple days
https://m.splinterlands.io/#/battle/game/process/sl_947d1b7af42f8ff4685c65e03ebfdfa1
Heres another instance from a tournament I just played I dont understand why there not attacking my back line.
https://splinterlands.com?p=battle&id=sm_tWmdbTocl1lBwcd13OyO&ref=lunchboxxx