Onedrive will give you problems
Make sure to use Check-in Changes daily and use Unreal Revision Control instead.
Save your maps outside of OneDrive, the file system of UEFN is fairly complex and Onedrive will not be up to speed with UEFN.
For example if you delete some content in UEFN, Onedrive doesn’t get the memo and will restore that deleted file, putting the object back in your map.