We have released an update for InDesign 2019 — that is 14.0.2 – which contains some stability fixes. If you are not already on 14.0.2 (build 324), we recommend you to update to this latest version.
Does InDesign show a Crash Report dialog after it closes? If yes, please submit the crash report to us.
(Guidelines to submit crash are available at https://helpx.adobe.com/indesign/kb/submit-crash-reports.html)
Also, see if trashing InDesign cache and prefs help resolve the issue.
Adobe InDesign teamJop shared this idea ·