I have a brand new install on Fedora, using the beginner install script (https://github.com/node-red/linux-installers) and none of the dropdown menus are viewable. I can 'select' them and use the arrow keys to sort-of tab through the hidden options, but a dropdown menu showing the complete contents does not work.
Steps to reproduce:
Install on fresh F31 image, using script from rpm installers repo
attempt to use dropdown for 'repeat' in Inject node.
Interestingly, dropdowns for 'payload' work fine (and others with grey background).