There is a syntax error in this and thus also insufficient info to answer your question. However lets assume you have a working filter that returns zero more than one result.
The inner list will only be “rendered” if your filter finds one or more items satisfying your filter. It will only render once due to the +[limit[1]], butr within that list as many as exist.
I’ve fixed the original post (it needed a “<” escaping), and my final working code in the backlinks tiddler is:
<$list filter=“[all[tiddlers]Property<currentTiddler>] +[limit[1]]” variable=~>Some text to precede the links:
<$list filter=“[all[tiddlers]Property<currentTiddler>]”>