Topics with or without navtitles don't display when previewing a map referencing them in Tridion Docs 13 SP2 web client. Is this a configuration? The titles appear in publication manager. The titles only appear in webclient map preview if they are explicitly mentioned in the map file, in a navtitle element. Is this expected behaviour.

Example where titles don't show up

<map id="GUID-E2879E08-A636-4C11-9349-AB3022C17028" xml:lang="en-US" xmlns:ditaarch="">dita.oasis-open.org/.../">
<title>Penile Implant: Before Your Surgery</title>
<topicmeta>
<navtitle>Penile Implant Surgery | Pre-op</navtitle>
</topicmeta>
<topicref format="dita" href="GUID-C3171E43-2EF5-4CF7-BEB4-89DFF52AC9CD">
</topicref>
<topicref format="dita" href="GUID-E70A4EF2-41B3-480F-BF41-A8465609D787">
</topicref>
<topicref format="dita" href="GUID-C3782AFA-11A4-4C5F-A5C1-FC54088EC094">
</topicref>
<topicref format="dita" href="GUID-A8CEBF95-5999-408B-9C94-3E8233C6684E">
</topicref>
<topicref href="GUID-BF84410C-1633-4801-92B8-9F97A2A9A4C6" format="dita">
</topicref>
</map>

Example where titles do show up

<map id="GUID-E2879E08-A636-4C11-9349-AB3022C17028" xml:lang="en-US" xmlns:ditaarch="">dita.oasis-open.org/.../">
<title>Penile Implant: Before Your Surgery</title>
<topicmeta>
<navtitle>Penile Implant Surgery | Pre-op</navtitle>
</topicmeta>
<topicref format="dita" href="GUID-C3171E43-2EF5-4CF7-BEB4-89DFF52AC9CD">
<topicmeta>
<navtitle>Penile Implant: Before Your Surgery</navtitle>
</topicmeta>
</topicref>
<topicref format="dita" href="GUID-E70A4EF2-41B3-480F-BF41-A8465609D787">
<topicmeta>
<navtitle>Penile implant surgery: Overview</navtitle>
</topicmeta>
</topicref>
<topicref format="dita" href="GUID-C3782AFA-11A4-4C5F-A5C1-FC54088EC094">
<topicmeta>
<navtitle>What happens before your penile implant surgery?</navtitle>
</topicmeta>
</topicref>
<topicref format="dita" href="GUID-A8CEBF95-5999-408B-9C94-3E8233C6684E">
<topicmeta>
<navtitle>What happens on the day of penile implant surgery?</navtitle>
</topicmeta>
</topicref>
<topicref href="GUID-BF84410C-1633-4801-92B8-9F97A2A9A4C6" format="dita">
<topicmeta>
<navtitle>PI reuse: Adult procedure, when to call your doctor</navtitle>
</topicmeta>
</topicref>
</map>