Just completed upgrade and it seems to have resolved the problem. For others visiting this is working on a Synology DSM RS820+ ands is working great.
FYI to anyone reading this. I went from 1.14.6 directly to 1.15.2. I did not follow the guides and I over wrote my ost-config.php. Fortunately for me I had a way to recover that file as well as all the notes I needed to recover db and admin information.
So before you upgrade make copies, backup db and then proceed