UMG question - why text remains visible in editor even when set to hidden?

Does anyone know why text remains visible in editor UMG even when it is set to hidden?

Also, when posting questions to answerhub this extremely annoying list box comes up suggestion similar questions, with no intuitive way to get rid of it (by the way I did look for similar questions, obviously). It remains on top of the screen, in front of this very text box I’m typing right now. It is irritating and poorly thought through, or I’m being a complete knob and others know how to circumvent this annoyance - advice would be appreciated.

Best regards,
Al