It’s the first time I’ve heard this observation about the straps in #2561… –are you sure you’re adjusting your straps properly? Fantasie uses “restricted stretch” straps for firm support, which still allows freedom of movement.
Make sure most of your support is coming from the body of the bra, not the straps, but this can only happen if you’re in the correct size.
Generally speaking, most often the problem is that the band is too loose, and the cups are too small. Do refer to Tomima’s 3 Steps to a Fabulous Fit to help with this.
Cecile from Sanford, ME