Sync issues with Ancestry in Family Tree Maker 2019 can be a frustrating challenge for users trying to keep their family tree data consistent across both platforms. These issues typically arise when there are discrepancies between the information stored locally in Family Tree Maker and the data on Ancestry.com, especially after making updates or changes. Common problems include failure to sync new entries or updates, errors during the syncing process, or incomplete data transfers, where some facts or media files are missing. Often, these sync issues stem from network connectivity problems, outdated software versions, or mismatched account settings, but they can also occur due to Ancestry's temporary service interruptions or database issues. Resolving sync issues may require troubleshooting steps such as ensuring both Family Tree Maker and the Ancestry account are properly linked, confirming that the software is up to date, or clearing sync history. In some cases, manually re-syncing or even restoring a previous backup may be necessary to restore data integrity across both platforms. Users encountering persistent sync problems may need to reach out to Ancestry or Family Tree Maker support for more targeted assistance.