Plug-in note 2215142 is quite important and corrects an issue with goods movements not all reaching GTS when you process several together (more than one entry in IT_MKPF) with different products. Due to a coding error delivered with SP22 of SLL_PI, only the first entry is processed correctly. The error affects documents relevant for CWH, IPR, PUC or FTZ.
Please keep in mind that the error should not affect single postings.
Note should be installed if you are on SLL_PI22 or higher, to avoid GTS stock issues.