Not sure if it’s intended or not but a non-default formation was set as all my friendlies and divisionals during the season tick.

Is this normal?

I had to go back and set all my squads to either default or another specific formation for friendlies.

I confirm that the same happened to me. I have 2 teams: the first squad and reservers. All matches are setup with the reserve team.

This has just been fixed. Thanks guys.