My slider is borken

Yeah, hi, its me again. So I’m making a UI screen as a part of my game. Its supposed to contain 3 sliders and a value read out. Problem is, this thing keeps happening.

The thumb thing comes completely loose from the slider, and I can move it around the screen freely. It also does not change the value on the slide, and the slide value itself is not within the limits I set. This happens at random to the three sliders, and I have no idea what is causing it. If you can help me, thanks.