Mouse left button doesn't work to navigate viewport when MetaHuman control rig is selected in UE5.4 and 5.4.1

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

UI/Tools

Summary

Since UE has updated to 5.4, mouse left button stopped working to navigate viewport when MetaHuman control rig is selected. The button works to pan and zoom before UE5.4, and in UE5.4 when control rig is not selected, but it draws a rectangle and moves MetaHuman’s root gizmo when control rig is selected in UE5.4 and 5.4.1.

Steps to Reproduce

  1. Add a MetaHuman to a level
  2. Add a level sequence
  3. Add the MetaHuman to the level sequence

At this point, mouse left button still works to pan and zoom in viewport just like UE5.3 and earlier.

  1. Select MetaHuman control rig in the level sequence

Now moving mouse with the mouse left button pressed draws a rectangle and moves MetaHuman root gizmo and doesn’t pan nor zoom in the viewport.

Expected Result

Mouse left button continues to work to pan and zoom regardless of MetaHuman control rig selection state.

Observed Result

Written at the end of Steps to Reproduce section.

Platform(s)

PC

This is not fixed in UE5.4.2.