Building on Linux, and the build menu won't displaycorrectly

I’m building on a RHEL 7 box, and everything seems to work fine with the exception of the build drop down menu for whatever reason. It has the right shape, but all you’ll see is an off-centered crop of the editor that would be behind the menus, but no menu or menu test. Although if you hover over the “transparent” menu you’ll get callout for the submenus to the right, and the appropriate hover help where available

This only happens on the build menu at 4k, all other menus are fine, and will also be fine at 1080 resolution. Any ideas?