мы в 2.1.0 исправили алгоритм обработки стратегий, в последних двух версиях не трогали.
Были внесены следующие правила:
Each view interface must have all strategies defined in it, even if it's not used directly and only used as superinteface.
If interface has methods without strategies, compilation should fail.
If superinterface method is overriden by child interface, than it should have child strategy, whether it's defined directly on the method or on the child interface. Methods are compared by name and parameter types.
Superinterface strategy is not inherited. If child interface has no interface strategy and some method in it is defined without any strategy, than compilation should fail.
я так понимаю, вас затронуло как раз первое.
@aasitnikov помнишь, для чего мы его ввели?