After streaming a game via a Capture Card I used my 1st monitor as the one to see my game on for the PS4, where monitor 2 was used for the PC to manage OBS etc. After stopping my play-through of the game I go back to a normal 2 monitor set up for my PC. I can detect games/windows being played/used on monitor 1 just fine, but if I try "Display Capture" it only shows my second monitor as the only option. No internal settings have changed recently, so I have no idea as to why this has been happening.
Logs: https://obsproject.com/logs/SHKM3xQmbfDfywib
Logs: https://obsproject.com/logs/SHKM3xQmbfDfywib