Random crash with OCMock

Sometimes I get a EXC_BAD_ACCESS when running this test:

- (void)testThatItDoesNotSaveLoadedImageIfNotIntializedWithModifiesFileCacheOption {

    BETwoLayerCacheImageProvider *imageProvider = [[BETwoLayerCacheImageProvider alloc] initWithCache:self.cacheMock imageLoader:self.imageLoaderMock options:0 scale:2.f];
    __block UIImage *expectedImage = [UIImage new];
    [[self.cacheMock reject] saveImageAtURLInFileCache:[OCMArg any] forURL:[OCMArg any]];
    [[self.cacheMock reject] saveImageInFileCache:[OCMArg any] forURL:[OCMArg any]];

    __weak typeof(self) welf = self;
    OCMStub([self.imageLoaderMock downloadImageWithURL:[OCMArg any] completionCallback:[OCMArg any]]).andDo(^(NSInvocation *invocation) {

        // [invocation retainArguments];
        void (^callback)(UIImage *image, NSError *error, NSString *imageURL, NSURL *temporaryImageURL) = nil;
        [invocation getArgument:&callback atIndex:3];
        callback(expectedImage, nil, welf.smallImageURL, [NSURL fileURLWithPath:@"/file:///fixtureURL"]);
    });

    [imageProvider fetchImageForImageData:self.imageData size:self.smallImageSize withCompletionCallback:^(UIImage *anImage, id<BEImageAware> imageData, CGSize requestedSize) {}];

    OCMVerifyAllWithDelay(self.cacheMock, 0.1f);
}

EXC_BAD_ACCESS happens here:

- (void)forwardInvocationForClassObject:(NSInvocation *)anInvocation
{
    // in here "self" is a reference to the real class, not the mock
    OCClassMockObject *mock = OCMGetAssociatedMockForClass((Class) self, YES);
    if(mock == nil)
    {
        [NSException raise:NSInternalInconsistencyException format:@"No mock for class %@", NSStringFromClass((Class)self)];
    }
    if([mock handleInvocation:anInvocation] == NO)
    {
        [anInvocation setSelector:OCMAliasForOriginalSelector([anInvocation selector])];
        [anInvocation invoke]; /// EXC_BAD_ACCESS
    }
}

The weird thing is that it never crashes when I run only this one test, but I crashes almost always when I tun all my tests (with cmd+u).

I tried to add [invocation retainArguments], it did not help, and I think should not be here. Anyone had such problems?