Symptoms
Workflow history reporting is not functioning correctly. Individual list items do not show any instance history on the "K2 Workflows" page.
Diagnoses
lProcDelete was deleting too many entries from [ServerLog].[ItemInstanceInput], causing workflow history to go missing.
Resolution
A codefix was created to make lProcDelete only delete the required ItemInstanceInput rows. This codefix was applied to the server.
The codefix will also be applied permanently to a future update. If you run in to this issue, please log a support ticket referencing this community article.