the astro pad thing wasn't showing up as an extra monitor in display settings in either nvidia app or windows display settings yet i suspect if it wasn't the update it was doing some dirt somehow somewhereI woke up today after using obs last night without any prob with this exact problem. The only thing I can think of that might have changed is I installed this astropad app to use my ipad as an extra screen (i also have multiple montiors lotsa screens all together).
In any case not sure if it was somehow that running in the background or the program needed an update but I changed to the beta /preview version and updated and restarted the computer at the same time. Im guessing it was update or closing out that ipad app thing that fixed.