Matty Healy's mother's shade at the Grammy winner caused an outburst from her fans online, but Taylor Swift remained silent.

Denise Welch, the 1975's Matty Healy's mother, is auctioning off the famous Glastonbury 2025 'Brat' flag for charity ...

Matty Healy's mom caught a lot of heat for her recent comments about Taylor Swift ... and, it might be getting to her -- because she was just spotted crying ...