LineRenderer Width Glitches in Build Only

In my program I am animating an appearing line by adjusting the widthCurve of a line renderer every frame. This works fine in the editor, however in the build there are some weird glitches with the lines width sometimes covering the whole screen or the line appearing in areas it shouldn't.

Video of Lines in Editor

Video of Lines in Build

(I could only capture the second kind of glitch in the first line that appears, towards the end of the line)

I have tried adjusting the spacing of the keyframes in the AnimationCurve, thinking there might be something weird going on with the interpolation. I have tried setting the tangents to 0 manually to avoid the values overshooting my desired values.

My main problem is that I don't know how something that works in the editor just breaks in a build? Is there any likely/known problem source? Is there a good way to go about finding a solution for a problem in builds only?

Thanks for your help in advance!