If your player switches dimensions while the in-game menu is open, Delta Client decides to capture input again (meaning that you can move and use the mouse to look around, and can't interact with the SwiftUI buttons). Had a quick look into this and couldn't see anything immediately obvious. Might be worth following through exactly what happens when switching dimensions to find anything that might trigger the client to capture input again.
If your player switches dimensions while the in-game menu is open, Delta Client decides to capture input again (meaning that you can move and use the mouse to look around, and can't interact with the SwiftUI buttons). Had a quick look into this and couldn't see anything immediately obvious. Might be worth following through exactly what happens when switching dimensions to find anything that might trigger the client to capture input again.