I've had something similar happen to me. Except it wasn't the fabric grew so much as it bred! And had 5 yard length babies!

Instead of the 3 yards of a gorgeous silk taffeta I had initially, I eventually ended up with around 8 or 9 yards in total. One 5 yard length appearing in a bag with a UFO of mine!

Looking forward to seeing what you make from it. Wish I could wear a white damask but white is not my colour.