Invisible files? Why are some of my files becoming invisible?

I create a file in InDesign. Save it by creating a new folder in creative cloud. Work on the file. Save. Make a PDF and send to the client. Client has revisions. The file is gone! When I search finder with the file name it shows that it is exactly where I saved it. I can open it, edit it, save a new version, make a new PDF. But when I navigate in the finder to where is supposed to be it isn't there. It's as if the file lives in the place I put it but it's become invisible unless I search for the file name. I also cannot see it on the creative cloud web. Anyone else having this issue?