Greetings again, Reika!
Thank you for your patience with the wait for a response to your report. After a thorough inspection based on the information that you have provided, the development team deemed this matter to be linked to connection latency, since you stated that it only happens occasionally, and you are still receiving the SP/XP. If you continue to experience this trouble on a more frequent basis, I recommend submitting another detailed report through another thread, and we will make sure to pass along the information for you to the development team. Thanks again for your patience!