I have this issue from the 25 version and I upgraded it to 26.4.1 and the issue is still shown. The waveform label color is inverted and it looks darker and hard to see. This is a big problem and it did not encourage me to use Premiere Pro because it is annoying from hard to see to edit. Please see the screenshot that I sent below.
p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.
* And also I type the version wrong. The bug is shown when I update from version 24.3 to 24.4.1. And it's still a bug in the latest version 24.6.1 to this date.