I have this mailto link markdown in my Trello card that works for ages
[hientran\@clientdiary.com](mailto:hientran@clientdiary.com?subject=Test)
That will gives hientran@clientdiary.com with the mailto link with subject prefilled.
However, just today, when hovering on it, the browser link preview at the bottom left corner shows "invalid-mailto:hientran@clientdiary.com?subject=Test". Hence, when clicking, it opens an empty new tab.
Any ideas what happened? Was it an update from Trello that breaks it?
Thanks