Tooltip is not removed if target element are removed dynamically

I made a minimal replication of the issue here:

https://jsfiddle.net/s2LzLc68/1/

This might look like a weird use-case, but if the clickable text is a link, and the link performs an ajax-loading of content, replacing the link, the tooltip will stay.

A workaround would be removing all instances of .mdl-tooltip in the DOM when ajax-loading resources, or on click events with .mdl-tooltip as target.