This looks odd. May I ask you to send me a userConfig.xml file (contact@voidroom.com) - this is to check the settings you have and, if it is possible, a screenshot of how it looks like?
It could happen if FXAA is the only thing set and maybe with some supersampling (oh, BTW, do you have Oculus, Vive or WMR? Oculus has different implementation of supersampling). But then it should appear only a bit blurry but all the time.