Heliboard word correction menu: invisible when e/os use dark mode

Hi, I just started using heliboard as my keyboard app on my FP6 running e/os 3.6. When I mistype a word, heliboard underlines the word in red. Clicking the word opens a menu with suggestions for the correct word to use. This works well except when e/os is set to use dark mode. When dark mode is enabled, this menu still opens but the text is white on a light gray background, which makes corrections impossible to read. Is there a fix for that, except not using e/os dark mode?