[SOLVED in 5.2.3] Navigating Folder contents does not update buttons/actions in the toolbar in Plone 5.2.2

A reminder/warning, this is a nasty issue which is resurrecting itself from time to time In Ploen 5 and is now alive again on Plone 5.2.2

But more detailed information is in this older issue where multiple causes are found and fixed:

Strange in this latest episode is that I don't see any javascript error on the console. The toolbar just doesn't update at all.

Possible fix in https://github.com/plone/mockup/pull/1028

the toolbar pattern registeres event handler for when navigation happens in the folder contents, but the function replaces the toolbar DOM on which the event handler is registered. So after one succes update update the handler is broken somehow.

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