The "graphical abstract" at the start of the linked article seems to be the intended takeaway.

It seems to be a somewhat predictable consequence of the fact that perception appears to work by us predicting what we're seeing/experiencing, with sensory input merely guiding/correcting those predictions. This is also related to us mostly only seeing/remembering what we're focused on (i.e. focused on predicting).

So, if we're predicting/focusing on an episodic experience fitting some sequential "template" (e.g. restaurant or proposal), then that's how we'll perceive it and segment/memorize it.