This process has appeared after this new update. I don't know if it has anything to do with this new Origin running like absolute rubbish, but the process is taking up just as much memory as 'Origin.exe' and there are multiple QtWebEngineProcess.exe running (3 for me right now, to be precise). This is with no game open, no library/menu/main origin page open, no chats open - I only have the detached friends list open. Then there's also the Origin Client Service process running as well.
Origin has always run badly for me and has now only gotten worse.