Ineffective magnet-shroom even with Buffz...

For some reasons, magnet-shrooms are ineffective this week against poncho zombies even if they should be boosted with the Buffz for Contain-mint family plant.
Are they too sore after being used and reused a lot last week so they are powerless now ?!? ☹️
Poor magnet-shrooms, I'm really wondering what is wrong with you.... we loved you so much... 😢 😢 😢 😢
At least we can still use them in Adventure mode...