Hi,
This is normal although the event viewer message is a bit misleading.
The WIReportServer is designed to be recycled/killed once it has processed "Maximum Documents Before Recycling", e.g. 25, so that the allocated memory and system resources from that WIReportServer process can be returned back to the OS kernel and to be recycled.
Then, SIA starts a new WIReportServer to replace the recycled one.
Hope this helps,
Jin-Chong