I just back to play in S2.
What surprised me is the saved team composition is also deleted. This was not explained before in the reset rules.
Saved team composition is just a note of players which impact nothing to the game performance. It helps me to keep who's who, and what's whose.
Suggestion:
Please don't delete the saved team composition upon next S3 or please write down at the reset rules should you decide to wipe it out.