I have a custom context menu with named triggers with icons. In the context menu, the icons appear dark and nearly invisible because the background of the context menu is also dark.
I also have the same issue when my MacBook switches to dark mode in the evening. I've also noticed that the icon for the context menu item can't be an emoji which would be a workaround.
Could you check whether this works for you in the 3.735 alpha? (get via check for alpha version updates)
Amazing @Andreas_Hegenberg the new alpha version fixed the problem, thanks!