How to close Help on Selection window?

The "Help on Selection" feature has been part of Matlab for a while now. If you select a keyword in a Matlab window and press F1, a new window opens with documentation for that keyword. When you are finished, you can press Escape to close the window. Super efficient and handy. However, since R2020, the Escape key has stopped closing the Help window on my computer(s). This makes the feature much less useful :( Is anyone else having this experience? Does anyone know why this is happening? I am using macOS.