It has come to our attention that there is a bug in Reason 13.2, where NN-XT and Kong patches with multi-layer/layered samples don't load correctly. The result is that the samples are deleted after saving/reopening song files. The samples won't turn up in the missing sounds window either, they are just gone.
So, don't re-save songs with this problem in Reason 13.2!
While our developers are looking into this issue, the current workaround is to download and install the previous version - Reason 13.1. Opening the song files in Reason 13.1 will get the samples back.
Here are the Reason 13.1 downloads:
We're really sorry for the inconvenience!