PvZ Heroes bug

Quarterly bonus card is glitched. It was reworked some time ago, and currently it says "strenght of a zombie becomes 4, then it does a bonus attack". But the strenght instead of becoming 4 becomes +4. This makes it too overpowered and abused by players. Plant heroes rarely win any rounds when zombie heroes are using this card. It's also a common card so literally everyone can get many of them. Please nerf it or fix it so it works like it should.