This is not a problem with lists per se. This is a result of how Parsoid represents templates in the DOM, and where some transclusions doesn't generate well-balanced DOM structures.

Parsoid marks complete DOM subtrees as template-generated/affected. So, in scenarios where output of a template spans multiple dom subtrees, all those affected subtrees are wrapped as one piece.

You can reproduce this behavior with a simple example like: "a {{echo|b\n\nc}} d". In this example, b and c belong to different paragraphs which also contain content from outside the transclusion. So, all of it is pulled into the template wrapping.

This is the same behavior where multiple transclusions are used to generate football tables, succession tables, etc.