decryption failed null

Since 14.2 iphone update, Password protected Office files will not open without using the Office( Excel, Word) app.

I called Apple and reported this 2 weeks ago. I have a ticket number. I see on the web that many people are having the same problem( I first noticed it when I tried to open a Dropbox excel file and thought it was a Dropbox issue- it is not). I see also that Iphone 12 users who updated to 14.2.1 did not get this fixed. I am using a Iphone X.

Does anyone know if Apple is aware how big a problem this is? Any feed back that they are going to address it?