I assume you are referring to issues with harvesting resources, and that the issue is that some workers block each other when there are a lot of workers trying to harvest at the same location. This can happen if you directed several workers to harvest in the same location because they will continue to attempt to harvest exactly there and not in neighbouring fields where the same resource is available. If this is the issue you are running into, this is not a bug, since this is a logical behaviour. You can, however, work around this by not making all your workers harvest at the very same location. Simply assign different harvesting locations to them.