You could also try to switch between fullscreen and borderless window by pressing ALT+Enter. I got no problems with Destiny 2 streaming, but when I hit ALT+Enter, OBS shows only the black screen and when I press ALT+ENTER again, OBS can capture again.
This did not work aswell. ^^ Dunno why OBS or D2 hate me so much.. Never had any problem with any game ihave been streaming since ever :O
Even went so far that i tried Xsplit but that program did suck so much i got sick on even trying it :D