Missing application ribbons

[judith MP]

We are a team of 12 people running Office 365. In the office we are connected to a server but also have remote access through a RDP connection. One of the users has issues with the application header/ribbon disappearing and this happens both in the office on her desktop PC and remotely on her laptop. The top ribbon disappears from excel/word/edge etc and she cannot close the windows and has to revert to restarting to recover. It is not obvious what triggers this to happen but opening pdf files seems to be a common but not exclusive cause.Any suggestions please, could this be a profile problem?

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