PushSharp and Background task

Question

I have been using PushSharp during these last 4 years without too much trouble, and I lately experience problems when sending to more than one device at a time. I was wondering if in a Web environment there is a need to run the PushSharp process in a separate thread in the background or if PushSharp will do that anyway. The reason is that if a web page triggers the push, it will kill the thread as soon as it finishes (although framework 4.5.2 introduced QueueBackgroundWorkItem that will continue to run, but I could not see any difference). On the second hand if the PushSharp task takes too long it will keep the web page busy for an unnecessary time that may be long if there a lot of notifications to send.