If you play with the most severe of the activation options on, then if an activation check is failed, the entire stack may be locked and frozen for 1 turn.
If that stack happens to be the big pile of new generals for the year, then they are all completely useless!
This can continue for several turns or reappear at anytime.
I somehow doubt this behavior was within the intention of the rule.
Ideally, a stack of all, "100% pure " generals, should be exempt from freezing of the entire stack.