today's German word for you: Vorführeffekt
n., the phenomenon that something which was previously working correctly, suddenly does not work correctly when one tries to demonstrate the operation to others.
@wildweasel @wohali can be used for both. I'd even say it's more often used for things that suddenly work again, but that might just be my luck
@wildweasel @wohali i joke that it's the scared computers knowing what's good for them when I get near
@wildweasel @wohali that would also be the Vorführeffekt as it is used whenever you want to demonstrate something but it shows a different behavior than usual.