Was out fishing for salmon yesterday and the drag on my 300 had some major issues. The night before I preset my drag at about 7.5 pounds. The next day landed one salmon no issues, then on the second and third fish were lost as the drag decreased dramatically while fighting the fish. To have any drag at all I had to go into full or thumb it. I though maybe I was bumping the drag dial or something. So I reset the drag and placed it on the downrigger and it began loosening on the downrigger so I know it isn’t human error. Any ideas?