As shown in the screenshots, when hovering over the the belt speed, the tooltips for some buildings are rendered below the visual representation of the building, making the text partially unreadable. This affects most buildings that have a hoverable element to the right of the building: cutters, swappers, stackers, painters, crystal-generators and mixers. I didn't find any other buildings or UI-elements with the same issue.
I'm playing on borderless, 1920x1080 and UI-scaling 100%. To be sure, I tested it with windowed and full-screen mode, with different resolutions and different UI-scalings, but the issue is unrelated to that.