Word 365 Serial Letter Mergefield date not working

Hello everyone,

Situation: I'm using an excel-file as a list (recipients) with a date in it.

In the serial letter usually it's possible to format the date with (e. g.)

{ Mergefield Text \@ "dd.MM.yyyy" }

But in Office365 it's not working any longer from my point of view.

In Word2019 it's still working.

Do u have the same issue?

Thx in advance

Mike