I clicked a password reset link on my phone that took me to the page without the trailing slash resulting in a 404. Adding the slash back in manually fixed the issue.
I just tested this and I'm not seeing this.
Maybe your email client didn't include the trailing slash when you clicked the link? If your email really does not have a trailing slash, can you post a screenshot (with the actual hash obscured)?
The email client did have the trailing slash, but didn't include it in the actual link for some reason. Thus when I clicked it, I was taken to the URL minus trailing slash which 404'd.
It was there, but wasn't included in the anchor link.
Screenshot attached. Note trailing slash not picked up on bitbucket.org text either.
Is this just an .htaccess rewrite rule that could be tweaked so that it doesn't REQUIRE the slash?