Tab title bar shows white text when white background is used.

The topic that best describes my question is "Appearance", but I don't see that topic in the dropdown. Firefox 159.0.1. I have Firefox adhere to "system colors". The current tab title has a white background, the others blue. With an older version of Firefox, the text in the tab title was black if the background was white. With version 159.0.1, the current tab title uses white text if the background is white, making it unreadable. See images with red arrow pointing to what I'm talking about. The first 2 images show the new Firefox, 159.0.1. The 3rd image shows an older version, that properly adjusted the text color to black, if the tab title area was white.