Why does a black box appear on my product view?

[sophearot]

Hello guys,

I’m having a strange problem. I don’t know how to explain. So please take a look at the two pictures below.

The first is when I just mouse point to the product, that black box appear below product title.

Second is when i just mouse point elsewhere. I have no idea whey this happening.

Please help me fix.

Thank you very much in advance.

[Nick_Marketing]

It would be helpful if you could provide the website link.