Hello,
The pull did not fix the issue completely. If the slug contains a + sign, it will show the 400 error.
To confirm this, I have switched back to “None” for slug generation, edited the title and removed the + sign from title and switched back to “encoded” it fixed the 400 error.
The scenario is when a title includes a plus sign, it returns 400 error. (There could be other characters that could lead to this. I only tested the + sign)
Thank you