To me the worst offender in revolut is that the ui is not blocked when is waiting for server responses (second is the inability to edit my preferred contacts list). It never caused me problems but I always felt uneasy (I use it more sparirily now so perhaps they fixed something). All the other problems that I care about have been slowly resolved. About the issue at hand this is not the first time the service is down but who knows, perhaps they're starting to learn their lesson. I used it for around 6 months intensively