I have an offline map in Field Maps that is failing to sync. The General Errors is "The network connection is lost."
I have tried multiple cellular and wifi network connections with no luck.
Please help me identify other ways to troubleshoot this issue.
Use an app like Open Signal to detect how strong your connection is. I've never seen recommended bandwidth specs from ESRI.
How big is your data set? Does it have a lot of attachments?
If all else fails, use Copy runtime geodatabase contents to a file geodatabase in ArcGIS Pro or newer tool in Pro
I am having this exact same problem and can't find any solution. I have 62 local edits and a lot of attachments. I tried syncing on wifi and on cellular data and get the same error.