If you can attach a packaged workbook with an example of your problem, we might be able to help. Even better, please attach versions from before (working) and after (not working) the conversion. Please identify the Tableau versions for each.
I understand the need to preserve confidentiality of your data. Please see Anonymize your Tableau Package Data for Sharing |Tableau Support Community to assist with this. I know it can be significant effort, but we can't do much to help without seeing examples.