Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don’t know how to make a good report?  See

<https://orgmode.org/manual/Feedback.html#Feedback>

Your bug report will be posted to the Org mailing list.
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When adding a custom sequence of todo keywords to `org-todo-keywords', “`[ ]' -> `[X]'”, the function `org-todo-list' will not filter to those entries with keyword `[ ]', and entries with keyword `[X]' will not be displayed at all.

Steps to reproduce:
1. Add the sequence `(sequence "[ ]" "[X]")' to the `org-todo-keywords' list.

2. Add an org file with the following contents /as entries/ to the front of the agenda list:

   ┌────
   │ [ ] Unchecked and will appear in agenda
   │ [X] Checked and will not appear in agenda
   │ TODO Todo and will appear in agenda
   │ DONE Done and will appear in agenda
   └────
   (due to a quirk of my email client, I cannot paste the above as actual entries. Their structure does not matter, so long as they are all entries.)

3. Call `org-todo-list'

   You will note that “Todo and will appear in agenda”, “Done and will appear in agenda”, and “Unchecked and will appear in agenda” are listed. However, “Checked and will not appear in agenda will not”.

4. Press `NUM r', where `NUM' is the number corresponding to the keyword `[ ]'

   No entries will be displayed.

5. Press `NUM2 r', where `NUM2' is the number corresponding to the keyword `[X]'

   No entries will be displayed.

Despite what my org mode version says, I have tested this on the latest commit available for Emacs 28.1.

Emacs  : GNU Emacs 28.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0)
 of 2022-05-31
Package: Org mode version 9.7 (9.7-??-6eb773053 @ /home/shortcut/.emacs.d/.local/straight/build-28.1/org/)