Blank Tags With Numbered Slugs

Has anyone else experienced this phenomenon?

When I upgraded to 2.3.1 I imported all my old UTW Tags…

Each time I edit a post a blank(unnamed)tag is added that nonetheless contains a number in the “slug”- I am up to almost 2,000 altho I only have a hundred or so “named” tags. They are like freaking Tribbles 😉

I do use Christine’s tag “things” so I will see if I can post in a forum or leave a comment there as well…

At this point I am googling around for tag cleanup plugins!

signed, mystified ;-0