Editor crashes due to a material that contains MPCs migrated from another project

General Issues and Bug Reporting
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Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Assets

Summary

I have migrated a material that contains a Material Parameter Collections from another UEFN project.
Some behavior with that material caused the editor to crash.

Steps to Reproduce

  1. Select a material containing a MPCs, MPCs, textures, etc. and migrate them to another project. Assets Actions > Migrate…

  2. Open the project you migrated to. (My editor still crashed at this point)

  3. My editor crashed for all of the following actions.

  • Right-clicking or double-clicking on that material in the content browser
  • Selecting that material in the content browser and pressing the delete key.
  • Pressing the submit button to check in the project.

Expected Result

We can migrate materials containing MPCs and open them successfully.
The migration should not interfere with the check-in of the project.

Observed Result

See "3. " in Steps to Reproduce

Platform(s)

Windows

Additional Notes

I could not delete the material in question, but revert option of URC enabled me to remove it. Then I check-in of the project.

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The status of FORT-738544 incident has been moved from ‘Needs Triage’ to ‘To Do’.