Problems showing our pdf files

Hi,
After upgrading to OJS 3.2.1.4 we are having problems viewing the pdf files. See: e.g. Ændringer i det redaktionelle workflow - Fra OJS 3.1 til 3.2 | OJS på dansk
You have to download the file instead of having it shown in the PDF viewer

pdf-viewer

Best
Niels Erik

The problem seems to stem from Hypothesis. After disabling this plugin, the problem disappeared.