Is your display scaled in Windows? Maybe try disabling that scaling temporarily to see if that fixes it?
Another idea is to remove any plugins you're using temporarily to see if that fixes it. Basically, keep trying until you see something.
Also, are you on v28.0.1?
Are you referring to the "fix scaling for apps" if so.. ive already disabled it.
The plugins i currently have are (according to my logs): (I believe these are on default with OBS. And yes I'm on latest 28.0.1.
20:58:44.008: Loaded Modules:
20:58:44.008: win-wasapi.dll
20:58:44.008: win-mf.dll
20:58:44.008: win-dshow.dll
20:58:44.008: win-decklink.dll
20:58:44.008: win-capture.dll
20:58:44.008: vlc-video.dll
20:58:44.008: text-freetype2.dll
20:58:44.008: rtmp-services.dll
20:58:44.008: obs-x264.dll
20:58:44.008: obs-websocket.dll
20:58:44.008: obs-vst.dll
20:58:44.008: obs-transitions.dll
20:58:44.008: obs-text.dll
20:58:44.008: obs-qsv11.dll
20:58:44.008: obs-outputs.dll
20:58:44.008: obs-filters.dll
20:58:44.008: obs-ffmpeg.dll
20:58:44.008: obs-browser.dll
20:58:44.008: image-source.dll
20:58:44.008: frontend-tools.dll
20:58:44.008: decklink-output-ui.dll
20:58:44.008: decklink-captions.dll
20:58:44.008: coreaudio-encoder.dll