Group by on timeline fails if using lookup

Possibly an edge case but what can I say, I’m an innovator.

Thought it would be handy to have a timeline that showed the project dates grouped along with its related tasks underneath. So I created a dropdown field on project called grouptest. Then went into tasks and created a lookup field also called grouptest.

Went to timeline view, added both databases to the timeline, group by “grouptest” was visible but clicking on it did nothing. So it’s a buuuug I suppose? Not urgent to fix, just highlighting it FYI.


Can you provide a screenshot of the timeline?

Hi Michael,
Sorry about the delayed reply, haven’t checked in here for a few days!

Here’s a video showing what I was doing:

Again, no rush for me on this - this was more of an experiment than a real need.