retryWhenInstanceOf not triggering for subclasses about rxjava2-extras HOT 3 CLOSED

// e = the actual error
// cls = the class passed into the retry or fail instance lists
if (e.throwable().getClass().isAssignableFrom(cls)) {

 A.class.isAssignableFrom(B.class)
 // means this should work correctly:
 A a;  B b;  a = b;
 // and the opposite will require a cast:
 b = (B) a;

        @Override
        public Flowable<ErrorAndDuration> apply(ErrorAndDuration e) throws Exception {
            if (!exceptionPredicate.test(e.throwable())) {
                return Flowable.error(e.throwable());
            }
            for (Class<? extends Throwable> cls : failExceptions) {
                if (cls.isAssignableFrom(e.throwable().getClass())) {     // <--- this is flipped
                    return Flowable.error(e.throwable());
                }
            }
            if (retryExceptions.size() > 0) {
                for (Class<? extends Throwable> cls : retryExceptions) {
                    if (cls.isAssignableFrom(e.throwable().getClass())) {     // <--- this is flipped
                        return Flowable.just(e);
                    }
                }
                return Flowable.error(e.throwable());
            } else {
                return Flowable.just(e);
            }
        }