A bug with Pen tool


I hope you're able to understand the bug from the above screenshot. If not let me explain you.
So I was trying to make some shape and realized that the pen tool disappears the line the moment it hovers above another line.
What I wanted was the smaller A(smaller design) to touch the bottom line but the moment the pen tool touches the bottom line, the line to connect disappears.
If you are still unable to understand I would suggest try making the above design and see what you find.
