Tooltips on FontIcon not working properly for some icon sets

[sheydrich]

I have a lot of FontIcons in my application, and often use tooltips on them. 90% of the time, this works totally fine, but I noticed that when setting a tooltip on a FontIcon with an icon from the bootstrap icons set, the tooltip text is not displayed correctly. Here, I have installed a tooltip with text "This is some text!" on a bootstrap icon:

... while the same tooltip text is correctly displayed for example on CoreUI icons:

Bootstrap is the only set where I observed this problem, but I have not tested all of them (so many!), so no idea where this problem might show up as well.

I suppose this has to do with the underlying font being inherited by the tooltip?

(If someone else is having this problem and looking for a workaround: I currently simply put the icons in a container like an HBox and add the tooltip to this container instead)