Unable to close request due to phantom/ghost tasks

Unable to close request due to phantom/ghost tasks

We're using SDP 9207. On one of our service requests, we're unable to close it due to tasks not being completed. The request only has 22 tasks associated with it, but the Task tab reports there are 44 tasks (22/44). When in the "All Tasks" view, it only lists 22 tasks. What is causing this? I've included a screenshot. Thanks!

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