We just updated our Jenkins to v2.207.1 and our build estimation times on pipeline jobs have stopped showing up. Rather than a blue bar that when hovered over shows an estimate, we are now seeing the blue-and-white striped barber pole and an estimation of N/A.
I believe this behavior might be only on pipeline jobs - we have so few freestyle jobs that I haven't seen them run yet.
What logic does Jenkins use to calculate those estimations? How many builds will we need before those times fill back in?