Some tasks tagged with certain milestones do not show up in their parent project's Workboard.

But when going to Workboard for that specific milestone, they do show up!

Why is it so?

Example:

T123 and T234 are tagged with Milestone1 and Subproject1. Both Milestone1 and Subproject1 are defined under RootProject1.

When I go to RootProject1's Workboard, I see T123 but not T234. I can't figure out what affects whether the task will be shown or not.

When I go to Milestone1's or Subproject1's Workboards, I see both tasks there.