There is an issue that seems to be persistent, wherein the castle menu does not properly load when you first arrive to the castle. What seems to happen is that the menu attempts to load but the buttons are misaligned with where they appear to be on the screen. You cannot exit the menu because the buttons don’t register at the top of the screen. You can kind of partially work around this if you figure out where the buttons THINK they are but the only way for it to fully resolve is to wait until it finally reloads properly.
I have this issue on iPhone XS and XR. I submitted a ticket and was told it was a known problem that is being worked but it has been a week and there doesn’t appear to be anything on the forums about this problem.