This happens to me about once a week when editing in Lightroom... I go to edit in Photoshop while accidentally selecting multiple photos. This causes Photoshop to then dutifully open every selected photo one by one which inevitably crashes my computer, sends my blood pressure to dangerous levels, and ruins my workflow. I know... I should be more careful, but having a warning such as "You are attempting to edit 1128 photos in Adobe Photoshop. Do you wish to continue?" when opening large numbers of photos (say 10 or more) would be incredibly useful for preventing this human error. Or a way to stop it once started... Thanks!
Updates to Lightroom Classic were released last night that address this issue. Please download the latest update via your Creative Cloud app and install. Please let us know if you continue seeing the issue after updating to 9.2.1. Thank you for your patience!