Moving CAD items around sometimes causes a visual desync, where you can see 2 CADs in different places or one in a wrong position in the inventory. It is more common when shift-clicking items in the player inventory or using a sorting mod like InvTweaks.
Clicking on one of the affected slots corrects the desync, but it is quite annoying.

Using Psi 1.1-59, Forge 14.23.5.2772.

May have been fixed by edac4cf