Here's the setup needed to reproduce the issue:

1. Enable the setting Store revisions in a CMS/Pages database.
2. Add a field to the database (any kind works), and enable the setting Editable when viewing a record in the Display options tab.

 

WORKS: Add a record, and edit it in the normal form (Record actions > Edit). A revision is added to the database.

DOESN'T WORK: When viewing the same record, use the quick edit form at the bottom to change the field value, and click the Update button. No revision is added for the change.

 

===

Tested on a fresh install using default templates.

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.

 

Looks like a fix for this bug was included in 4.7.15. Marking as solved.