The 'delete for all' feature is straight up awful. As a group admin I should have the ability to delete messages for everyone in a group chat at any time without any restrictions. I can't delete any messages for everyone in my public group chat, this is nothing but a security risk, harassment risk and downright annoyance. This is a simple feature, GET IT RIGHT. Wouldn't recommend group chats in this app to anyone in the slightest anymore, I've just moved to discord for everything like this.