Hover over month view calendar problems

When I hover over the calendar, the not selected events text become white. Not helping the view of the name of the event. The weird part is that is not when I hover over the text itself, is when I hover over the background of the calendar. The whole week events became white as well as the days. I tested and is not a theme conflict. I could it be?

https://ww.wp.xz.cn/plugins/all-in-one-event-calendar/