Half of the handle bar misses after edit.
Hi folks,
So, every time I move my handlebar, the other end of the handlebar disappears and cannot be edited. My professor said he had never seen anything like this and it is also very confusing to him. I will attach screenshots so you know what exactly it looks like. ( The process is, firstly I drag out the handles on the anchor point, then I drag the one on the right for editing, after I release my mouse, you see how the left one just disappears?)
Is there anything in the setting that I need to change?



