This bug should definitely be fixed. While the normal text on the tooltip was white for me and there readable (although very ugly IMO), additional content of the tooltip like icons and especially links are not visible well (see attachment). Changing the tooltip colors of the theme works for me. In my opinion, the tooltips of a light theme should not be black anyway but yellow like the users are accustomed to.
This bug should definitely be fixed. While the normal text on the tooltip was white for me and there readable (although very ugly IMO), additional content of the tooltip like icons and especially links are not visible well (see attachment). Changing the tooltip colors of the theme works for me. In my opinion, the tooltips of a light theme should not be black anyway but yellow like the users are accustomed to.