Can't remove tags with org-set-tags-command

### I confirm that...

- [X] I have searched the [issue tracker](https://github.com/doomemacs/doomemacs/issues), [documentation](https://docs.doomemacs.org), [FAQ](https://docs.doomemacs.org/-/faq), [Discourse](https://discourse.doomemacs.org), and [Google](https://google.com), in case this issue has already been reported/resolved.

- [X] I have read "[How to Debug Issues](https://doomemacs.org/d/how2debug)", and will use it to provide as much information about this issue as possible.

- [X] The issue can be reproduced on the **latest** available commit of Doom.

- [X] The issue can be reproduced on a stable release of Emacs, such as 27, 28, or 29. *(Unstable versions end in .50, .60, or .9x)*

### Expected behavior

When I have a heading in an org document "TODO Some Task :tag1:tag2:"
And I invoke "org-set-tags-command"
And I select "tag1" from the popup window
Then I should see "TODO Some Task :tag2:"

### Current behavior

But I see "TODO Some Task :tag1:tag2:tag1:"

### Steps to reproduce

1. Open Emacs
2. Open an org document
3. Add any new heading
4. Press Space+m+q (org-set-tags-command)
5. Type tag1 and press Enter
6. Press Space+m+q (org-set-tags-command)
7. Type tag2 and press Enter
8. Press Space+m+q (org-set-tags-command)
9. Select tag1 and press Enter

### System Information

https://pastebin.com/R53gAMfd