When connecting mesh sections to a Mesh Section switch, all tags defined in the in-going Mesh Section are seemingly NOT retained in the out-going Mesh Section.
This used to work in 5.5, where I had a set of character body meshes hooked up to a Mesh Section switch and tags on the different body mesh sections would be retained in the Mesh Section coming out of the switch node.
I tried working around this problem by hooking up the Mesh Section to AddToMesh nodes connected to Child Object nodes and use a Object Group node to switch mesh section instead of using my Enum and Mesh Section Switch node, but the result was exactly the same, the Mesh Section tags are not detected anymore.