We are also seeing this issue with our main software. We are advising our customers to disable the shell extensions/overlays or simply remove the Dell Backup and Recovery Software.
Why has Dell not addressed this issue? Not even a "thanks for letting us know, we are working on it.".....
Oh, yeah, its because it is Dell.
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We had the same problem in our application and realized that only version 184.108.40.206 is concerned and it sometimes come pre-installed on some PCs.
Version 220.127.116.11 did not use Qt yet and in version 18.104.22.168, they removed the dependency in the shell overlay DLLs.
So upgrading DBaR is enough to workaround the issue.