Custom screens and widgets often mishandle events. A prime example of this is ScrollButton and WynntilsSettingsScreen.
ScrollButton eats click events and because of the absent checks in WynntilsSettingsScreen it also has to have its own isDragged value which is something normally Minecraft handles which causes the Settings screen to be not compatible with Minecraft widgets. Additionally ScrollButton uses mouseDragged instead of onDrag.
related: #1883