PROBLEM SOLVED, I’m guessing it’s a bug in PMS?
Tried the “fix match” option but it only revealed one entry in the search results:
On a whim, I entered the year under “search options”, which resulted in A SECOND entry for “Runaways” being revealed in the results:
Clicking on the first entry in the new results led to the same old problem of no metadata being downloaded. Choosing the second prompted PMS to dl the correct metadata for the series.
Problem solved, but still, weird.

