Configuring preferences and options in Outlook.com
Installing an older version of GMail fixed the problem for me.
Just get the GMail apk from September 27 here:
https://www.apkmirror.com/apk/google-inc/gmail/
Then make sure that automatic updates are disabled for GMail in the Play Store App.
Sure, it goes! So, latest functional build is
Gmail 2019.09.15.270135155.release
Thanks for helping me!