In such cases your Scene Collection will not be saved (which happens at normal exits), apparently leading to loss of your sources information. I don't know exactly in which situations not saving properly is devestating or not... But since this seems to occur regularly to you, what might work: Export the Scene Collection (as a backup) and Import it again after a a crash.
At the main menu: Scene Collection, Import / Export.
Alternatively, in Windows Explorer go to %AppData%\obs-studio\basic\scenes and manually replace your Scene Collection .json file with its backup .json.bak Do this after a crash before restarting OBS Studio again.