Strange UI behaviour in Big Sur "Dark Mode"

Since updating to latest version of Lightroom for Desktop (4.2) i get an unusable UI window on "Export"  where no text is visible. See pictures attaches. I run the latest version of Big Sur in "Dark Mode".

If i switch to "Light Mode" in the System Preferences, the text in the UI window is legible but it still looks terrible! As if they have forgotten to update this one UI window...?

Same happens in the "Plugin Manager". (Also picture attached)

Running Big Sur, on MacPro 2019 with 192 GB of Ram and Radeon Vega II

Anyone else experiencing this strange behaviour? I don't want to change to "Light Mode" everytime i work in Lightroom.