LR6 crashes after deleting rejected photos

Recently LR6 has started having problems handling the deletion of rejected photos. 

My workflow is to import all my photos, set a filter on unflagged photos and go through them using Pick and Reject.  I then use ctrl-backspace to remove the rejected images and I select 'Delete from disk'.

Over the past couple of months, when there are more than a few rejected photos to delete, Lightroom does the job but then crashes to desktop.  I have exported half of my catalogue to a new one, but the problem persists so it doesn't seem to be catalogue size related.

Is anybody having the same problem?  I am on version 6.14, on a Windows 10 machine.

Thanks

Ian

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