I don't know if this is the cause of everyone else's issues, but I realized that there's a compatibility issue between Logi Options + (the software for Logitech's MX keyboard and mouse) and Adobe programs. After completely uninstalling Logi Options +, copy/paste is working for me again. I submitted a ticket with Logitech a few months ago, and of course nothing has been resolved.
I don't know if this is the cause of everyone else's issues, but I realized that there's a compatibility issue between Logi Options + (the software for Logitech's MX keyboard and mouse) and Adobe programs. After completely uninstalling Logi Options +, copy/paste is working for me again. I submitted a ticket with Logitech a few months ago, and of course nothing has been resolved.