Deleting a Sync Marker created by an Animation modifier deletes all Sync Marks made by the Animation Modifier

Using the delete key or context menu to delete a single sync marker created by an Animation Modifier deletes all sync markers created by the Animation Modifier.

If all the markers are deleted, and the action is undone then a single marker is deleted it behaves as expected.

If sync markers are created then deleted through the context menu in the Notifies Track then a single Marker is deleted the rest remain. 

1. Create a Third Person Blueprint Template without Starter Content
2. Create a Blueprint derived from the Animation Modifier called AnimModifier
   • Screenshot included. Skip to step 9 if you use the screenshot.
3. In the Event Graph add an 'Event On Apply' node
4. Connect that node to an 'Add Animation Sync Marker', linking the 'Animation Sequence' out pin to the Sync Marker's 'Animation Sequence' in pin
5. Set the 'Marker Name' to Mark1. The 'Time' to 0.1. The 'Notify Track Name' to Test.
6. Duplicate the 'Add Animation Sync Marker' then connect their execution pins
7. Change its 'Marker' name to Mark2. 'Time' to 0.2.
8. Connect the 'Animation Sequence' out pin from the 'Event On Apply' to the 'Animation Sequence' in pin of the duplicated 'Add Animation Sync Marker'
9. Compile, save, and close the blueprint
10. Open the ThirdPersonIdle Animation Sequence
11. In the Notifies Track add a new Notify Track then rename it Test
12. In the Animation Data Modifier window click the Add Modifier drop down then Select the AnimModifier
    • Window > (Asset Editor) Animation Data Modifier
13. Click Apply All Modifiers
14. Back in the Notifies Track select the Mark1 sync marker(It'll turn blue)
15. Press the Delete Key

Expected Result:
Only the Mark1 sync marker is deleted. This is the behavior of Sync Markers created through the context menu.

Actual Results:
All the sync markers are deleted.

[UE-23848] Bug Status

Request a info about UE-127172 bug tracker

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