The fieldset element and the wrapper div from the Better Exposed Filers template are being given the same (duplicate) IDs. Found the issues when using radio boxes, but according to the previous issue it happens with checkboxes as well. The parent issue also has a patch for 8.x-4.x that will not apply to the 8.x.-5.2 version that I'm using.
Uploaded screenshots with twig debugging to illustrate the issue.
Closed: cannot reproduce
5.2
Code
It affects the ability of people with disabilities or special needs (such as blindness or color-blindness) to use Drupal.
I couldn't reproduce this issue as the patch mentioned in the parent issue has already been merged with the previous version.
Also tried reproducing this on 6.0.x but no luck.
If still a bug please reopen.