Fetching attachement on smartphone failes via gmail app


Normally we use the native email app on our samsungs phones (A3 2016, A3 2017, A5 2016, A5 2017) to connect to the GMS server.
It works fine for all phones.

However since some time it is possible to use the gmail app for exchange accounts.
It works fine however we found out that attachements cannot be downloaded:
Fetching attachment... test.xlsx 0% -> and it keeps for that status and never gets downloaded.

However via the standard native mail app the attachment downloading works fine.

Version: 14.2.2 Build: 145

Can somebody verify to have the same issue with gmail app and attachments.