Ah, damn This is definitely not a problem on your end, but a slightly annoying browser quirk – basically, in some cases, the text color is inherited by the dropdown options, and in others it isn’t or is overwritten. I really thought I had this covered, but looks like I didn’t. Sorry about that.
Which browser are you using btw? Just so I can make sure to test and debug this properly.
In the meantime, you can always define a label set of 10 or less. This will display all labels as buttons in a row, and make them accessible via keyboard shortcuts. If possible, we’d always recommend annotating fewer labels at a time – it makes it much easier to focus on the task if your brain only has to think about a small number of options. It also means you have to do less switching between labels.