Mirrored Column Timelines Stopped Showing in Calendar View

I created an overview board with mirrored columns for project timelines. At one point the calendar view stopped showing the timelines and I do not know when or why. I’ve tried deleting and remaking the calendar view and toggling settings. Nothing has worked.

Any help would be appreciated!

Here are my calendar view settings:

And a sample of a mirrored column that should be appearing:

I’m having this same issue. I’ve tried deleting and readding as well, still haven’t found a solution.

I actually figured it out!

One of the connected boards did not have a timeline column. For some reason that caused the calendar to not show ANY timelines. Once I added a timeline column to the offending board the calendar started workig.