I think you can fix this using css > overflow: visible; somewhere on the class of the tooltip or alter the css of the tooltip to show on a different position.
You could also report an issue on github: https://github.com/mendix/BootstrapTooltip/issues
I just encountered this myself, was able to fix it by modifying the BootstrapTooltip.js
You should add a container in the following lines:
$targetElement.tooltip({
title: this._tooltipText,
placement: this.tooltipLocation,
trigger: this._tooltipTrigger,
html : this.tooltipRenderHTML
});
Solution:
$targetElement.tooltip({
title: this._tooltipText,
placement: this.tooltipLocation,
container: "body”,
trigger: this._tooltipTrigger,
html : this.tooltipRenderHTML
});
Not the most elegant solution, but it works.