I mean activate Text Edit application. This application has short menu. My suggestion is that some of your menu bar icons, including Parallels Toolbox icon, are just overlapped by application menu. If you activate Text Edit you can see more of your menu bar icons.
Compare two screenshots.
On first screenshot (where Text Edit is active) all my menu bar icons are visible (because application menu is short):
On second screenshot some of icons are invisible because they are overlapped by XCode menu:
Also please generate Technical Report (https://kb.parallels.com/en/124107) and post it's ID here.
Last edited: Aug 28, 2019