I am new to using slide, and I use it on an iPad Air 2 with an invisible shield glass screen protector. I am currently using it in the Adobe Illustrator Draw app. Even with the glass screen protector the Ink and Slide work fine for the most part. However, when using the slide, when I try and trace or capture the shapes they disappear, forcing me to start the process all over again. After several attempts I have given up on using the slide altogether, and instead I am using the in-app ruler guides to render and capture shapes and lines.
Is there some reason for the disappearing shapes when using the slide?