i tested a scripted private mod. it had buttons on the board (you know script buttons which let you choose stuff like.. : which expansio do you want to add? select it from the lsit. or.. how many players should be set up? click at the button).
buttons like.. when you open menu inside TTS, you can click to go back to main game etc.
so yeah, when there is a button on the table, and you open the menu which also has buttons, and the button on the table is under the menu button you want to click on, the menu button is overpowered by the board button and you cant click the menu button. its the button on the table/boar which is highlighted, instead of the menu button. you need to move your screen away from any board/table buttons to be able to use normal menu buttons.