Values not displayed from same multi-value node when included in multiple views on the same page

Please see attached screen grab.

To recreate this I have 2 views on the same page: one comes from views page, the other is a views block in the sidebar. Both views are showing nodes of the same content type and the visible dates are all derived from the same multi-value date field. The node with the missing dates in the sidebar is the only node in either view that is storing multiple values in the date field. Previewing either view in isolation suggests that the view works fine (no missing dates). As soon as these 2 views are present together on the same page the missing dates issue arises. Configuring each view to display fields or entity view modes seems to make no difference.