Investigate behavior of "More in this series" link

[maxkadel]

What maintenance needs to be done?

Determine whether the change in the query dsl changed the behavior of the "More in this series" link

Level of urgency

• High
• Moderate
• Low

Why is this maintenance needed?

• Requested by Minjie on slack in the #catalog channel

Record: Wo de jia

I am expecting about 163 results that have the string of "you tong wen ku" in (series) title field

Instead the "More in this series" hyperlink for the Romanized titles is retrieving 462 results

Acceptance criteria

• Determine whether the change in the query dsl changed the behavior of the "More in this series" link
• If it has changed, make a ticket to restore previous behavior
• If it has not changed, investigate what the correct behavior is, and if it is different from the current behavior, make tickets for desired behavior

Implementation notes, if any

Possibly an inadvertent change in #advanced_search_series_link when we switched to the JSON dsl? Possibly in this commit?

Should "clause[0][field]" be in_series rather than series_title?