P: Canceling an export to JXL can crash Lightroom

Canceling an export to JXL can sometimes crash Lightroom. To reproduce in LR 14.1.1 / Mac OS 15.2:

1. Download and open this catalog:

https://www.dropbox.com/s/64jcxpwzpmyrmlp/cancel-export-bug.2025-01-24.zip?dl=0 

2. Import the Export preset "To Catalog as JXL.lrtemplate" stored in the catalog folder.

3. Arrange Finder to show next to LR the subfolder cancel-export-bug/Desktolp/test-pics/jxl.

3. Select the two photos.

4. Right-click the first photo and do Export > To Catalog As JXL.

5. Wait until the first exported .jxl appears in the folder and immediately click the Export cancel button before the second .jxl appears.  LR will often crash.

6. If it doesn't crash, delete the one or two .jxls from the folder and repeat steps 4-6.

I've submitted several crash reports under my Adobe Id.  See the attached screen recording showing the recipe.