Thanks for the file Allen.
I am experiencing the same behaviour on your file; FM15 on Win 10 is ok, FM15 on Mac OS 10.11 will not hide.
So I guess it is my Mac's problem.
I've only used v15 on 10.11.4 and 10.11.5, so I have no idea how it might work on 10.11.1. But it sounds like there is an issue with that OS version. Maybe some others who use 10.11.1 will chime in.
Thank you for your posts.
I am unable to replicate the issue with FileMaker Pro 15 under Mac OS X 10.11.5 and Mac OS X 10.10.5. My hidden objects remain hidden in Preview.
Since you are able to replicate the issue, I would like to see a copy/clone of your file. I have sent you a private message with instructions where to send the file.
Just solved this.
The Mac was still running the Pre-release version of FMPA 15.
Installing 188.8.131.52 resolved the issue.
Thanks for your assistance, sorry for the time waster.