If you miss items during a review, the cram session only has the single sentence you missed for the “cram” session. There should be a way to configure the number of sentences for the grammar point.
In fact, you can’t even get the list of missed items into any kind of cram session configuration, you have to manually search for them and create a new cram session with different settings if you want anything except for the one sentence you still know from ten seconds ago.
I think this could almost be considered a bug because it’s hard to describe it as intended behavior.