One of my favourite ongoing jokes is Word, the program that exists for typing, 'randomly' deletes what you type:

https://techcommunity.microsoft.com/t5/word/word-online-web-...

https://answers.microsoft.com/en-us/msoffice/forum/all/how-t...

https://answers.microsoft.com/en-us/msoffice/forum/all/why-d...

https://answers.microsoft.com/en-us/msoffice/forum/all/word-...

https://answers.microsoft.com/en-us/msoffice/forum/all/text-...

https://answers.microsoft.com/en-us/msoffice/forum/all/text-...

https://answers.microsoft.com/en-us/msoffice/forum/all/word-...

https://answers.microsoft.com/en-us/msoffice/forum/all/when-...

https://answers.microsoft.com/en-us/msoffice/forum/all/word-...

https://answers.microsoft.com/en-us/msoffice/forum/all/why-i...

I have no idea how many engineers work on Office Online, but other than security bugs I cannot think of a more important issue to resolve.