Bug with 5.6.3.3 Update - Custom Attributes for Page Settings Caching?

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We've noticed since our update, when making changes and saving Custom Attributes settings for pages, the saved changes do not take place without a second "save", e.g. re-opening page, clicking on Properties and saving.

It appears to impact "Click to set as Featured News story", "Exclude from Page List", "Exclude from Search", etc.

We've tried clearing cache and our system cache settings are:

Full Page Cache - OFF
Block Cache - ON
Overrides Cache - On

We checked our database and core versions and they do match.

Any ideas?

nisqually