ScrollBar in Drop Down Menu – DeskTop Chrome

Hello,

I have detect a problem in my Drop Down Menu after the “select field” from the page https://www.etesco.com.br/teste/
When i’m in a desktop chrome navigator, the scroll bar does not appear com todas as opções.
But only in chrome when im on a desktop. In smartphone, safari, internet explorer etc it does work nice.

Anyone else had that problem? Anyone solved that?

The page I need help with: [log in to see the link]