An additional small bug: when I’ve been working in Rhino 8 (Mac) and go to another program, say a web browser, the hover icon from Rhino’s layers is still visible—on top of whatever I’m browsing.
If I click on the hover icon/word, it jumps me back into Rhino. Below you can see a layer title over a random web image, and in the second shot a layer title and state over the account settings for Instagram.