Soundfonts

I'm recently writing some scores for chamber ensembles, however wherever there is a fast movement the Violins, violas, and cellos start sliding (unwanted glissandi) during passages with no staccatos. I'm using the Muse Sounds soundfont for the strings however it's very annoying if there's no option to toggle the sliding off. I'm fine with the sliding in slow movements but it sounds very weird in fast movements.

Is there any way to fix this?