in _request_queue_client.py (async and sync client) there is a batch_add_requests method. This method is calling Apify API which can return some unprocessed requests in rare cases. This can happen for example due to rate limiting when there is high load. Currently it seems that those unprocessed requests are not handled in any way and will be just ignored.

Maybe the method should at least retry to add unprocessed requests in some final batch? Maybe with some backoff?

(Some context apify/crawlee-python#1155 (comment))