Discovered this while troubleshooting some disappearing accounts.
Hovering over a paycheck transaction shows the splits. (Unspecified Account should be a transfer to my FSA account.)
Clicking the checkmark to open the split transactions window displays Edit Current Paycheck… with no amounts.
I tried validating the file… and almost all paychecks were "flattened" to include only the net amount. All splits were entirely removed. Luckily I had a backup.
Thanks for any insights ~ Eleanor