Google Chrome	68.0.3431.0 (Official Build) dev (64-bit)
Firmware Version Google_Samus.6300.276.0

Steps to repro:

# Download any file. I used this one: http://www.heinzvinegar.com/infoGraphic/Heinz_Vinegar_Infographic.pdf

# Download dialog appears 
Expected: downloads dialog appears until closed like with Chrome browser bar
Actual: downloads dialog disappears after a few sec

I understand that this may be considered a feature request/works as expected. I'm opening it because during our recent assessment I found that there wasn't an alternative to this timeout. 

Therefore, please don't close this out as won'tfix without consulting with lpalmaro@.