In Chrome on windows the dropdown chevron on the breadcrumb bars no longer offer the menu or have any interactivity on them (not clickable).  

However when you hover over the text of the breadcrumb you can see that the chevron is part of the button.

The chevron should provide the dropdown of the menu however it is not.

Steps to reproduce

go to https://weekly.ci.jenkins.io/job/folder/job/failing-pipeline/   with chrome

click on the downward pointing arrow in the breadcrumb bar to the right of Folder (see circled element in screenshot)

Expected Result

The drop down menu for the folder (in this case, generically would be for any ModelItem) is shown.

Actual Results

Nothing happens