Slide - twisted result

Hello folks.
I applied Slide to a profile curve, but got a twisted mesh as a result. On the image you can see that twist attribute is set to 0 and I'm not using twist modify curve. Any ideas on what may be happening here?

Hi rubberDuck,

In the slide options, disable(un-tick) the "Use Path Curve Tangent spaces"

Thank you Steve, that was it!