I've been using my X-T1 solidly for two years now with the same set-up - usually my 18-55mm 2.8 or my 35mm 1.4.
Recently I've been finding that it's not as sharp as it once was. This is the same whether I shoot handheld or on a tripod (with OIS turned off).
For instance, I used the FujiFilm app to take some headshots of myself the other day and when looking at two images taken within a couple of seconds of each other, one was in focus, one was slightly out.
The sensor is clean and it's not been a problem until recently.
Has anyone had this before? Any advice?