Proofs disappearing in some rows when transferred to another sheet

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We have automation set up where when a task has been marked complete, it moves to another smartsheet for complete tasks. This helps keep our open tasks smartsheet uncluttered.

I just noticed that some of our rows that have moved sheets have lost their all of their proofs. Based on complete dates, it looks like the issue goes back to mid-October. Some rows have transferred with proofs in tact, while others have lost them completely.

This is vital information that we have lost. Please provide support for us.

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