Merge Academy - reduction of coins

As of yesterday (12/10/25), or at least the day before...I had well over 800+ coins in my purse.  It took me months to build up to that amount.  Suddenly, as of today (12/11/ 25), my coins dropped to 297... yet I bought nothing with them.  I was reserving them to open shelves in the dresser/cabinet.  WHERE DID MY COINS GO AND WHY ??  🤔