I think your tags should be formatted as a YAML list as covered in the Obsidian docs for the tags property in the note front matter.
Setting up an action like this:
Then using a draft like this:
# Call Log Example
Spoke about X
Spoke about Y
Spoke about Z
Gives me a note in Obsidian like this:
If you (or anyone else), did want to transfer Drafts tags to Obsidian tags, adding a script step like this ahead of the file creation:
let strTags = "";
if(draft.tags.length > 0) strTags = "\n" + draft.tags.map(x => " - " + x).join("\n");
draft.setTemplateTag("YAMLTags", strTags);
Means you can then use this line in your content template to put the Drafts tags in as Obsidian tags.
tags:[[YAMLTags]]
Hope that helps.