Moving task using list items adds [undefined] (in 0.17.2)

[esodesod]

Background: As events using list items was re-introduced in 0.17.1, I gave it a quick spin (in 0.17.2, which was released today).

Issue: Using timeline (view) to change the time (moving the event using drag & drop) adds [undefined] before the timestamp (see below). Using checkboxes, it works as expected.

To reproduce: Create a new event using list item. Move the task using Day planner timeline view (drag & drop to a new timeslot).

Note: Issue re-produced in Obsidian 1.5.6 (Insider), sandbox vault, only using latest versions of Dataview, Day Planner and Periodic Notes.

Screenshots