This is due to a new feature that 2D visibility of markups are now taken into account (see details here). You can either switch to a recent Slicer Preview Release or enable 2D visibility for the fiducials manually (by right-clicking on the eye icon of the markups node in Data module).
Related topics
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Fiducial markups not showing in 4.11.0 | 8 | 1082 | April 13, 2021 | |
| Fiducials- 2D projection | 1 | 368 | June 17, 2021 | |
| A few issues with the new Markups | 3 | 514 | March 7, 2019 | |
| Labels for Fudicial Markups Not Appearing Until 5th-6th Fiducial Is Placed 4.11.0 | 4 | 484 | April 24, 2019 | |
| Toggle fiducial marker at move slices | 0 | 151 | July 7, 2022 |