You are right @siko232
Today as it's Sunday and have more free time, I logged in to five of the teams I have.
One of them doesn't have the X2 vid button when I go for training.
- It's not the server - another team, same server, has the X2
- It's not availability - I can farm boosters
- It's not any kind of block and clean cache, uninstall-install ... doesn't help

Hade the same thing before a year and tried to figure out with Jeeves (the old adm) what's going on but couldn't.

Send a ticket to support, maybe they can fix the problem.

The other case is to wait a month or some next update.