Never move or rename .icml or .icma files in the operating system (Finder/Explorer). Only move them via InDesign/InCopy to avoid breaking links.
While check-in saves to the server, local saves prevent data loss. Adobe InCopy 2020 v15.1.2
InCopy works best when InDesign users create assignments ( .icma files) and include InCopy content ( .icml files). Never move or rename